Resuming org-mode clocking

Question

I use org-mode since 2012. I recently adopted the org-mode clocking work time capabilities and thus have created the following org-capture-template:

(setq org-capture-templates '("j" "Journal" entry (file (concat
  org-directory "/journal.org")) "* %?\n%u\n" :clock-in t :clock-resume t))

(define-key global-map "\C-cr" 'org-capture)

When I start working on something (eg. Project A), I press C-c r j and the timer starts. When I finish, I press C-c C-c. In this simple scenario, everything works fine.

However, there are occasions where I get interrupted during Project A, without time for any key press. For example, the phone rings and I discuss an urgent issue for 10 minutes. Before I return to what I was doing before the phone call, I want to keep log of the phone call.

|  time | event                        |
|-------+------------------------------|
| 10:00 | Clock-in                     |
| 10:15 | Interrupt                    |
| 10:25 | RETI (return from interrupt) |
|-------+------------------------------|

It is now 10:25 and the corresponding entry in journal.org is:

* Project A
  :LOGBOOK:
  CLOCK: [2016-09-27 Tue 10:00]
  :END:
  [2016-09-27 Tue]

Which is the best/recommended/straightforward way to achieve the following result?

* Phone call
  :LOGBOOK:
  CLOCK: [2016-09-27 Tue 10:15]--[2016-09-27 Tue 10:25] =>  0:10
  :END:
 [2016-09-27 Tue]

* Project A
  :LOGBOOK:
  CLOCK: [2016-09-27 Tue 10:25]
  CLOCK: [2016-09-27 Tue 10:00]--[2016-09-27 Tue 10:15] =>  0:15
  :END:
 [2016-09-27 Tue]

What is shown here is:
a) The phone call has been clocked from 10:15 - 10:25
b) The Project A has been clocked from 10:00 - 10:15
c) The Project A clock has resumed from 10:25

Answer 1

I believe this question is basically the same as How to manipulate clock times (org-mode)

I provided an answer under that question (currently the recognised correct answer if that helps you spot it), but the basic gist is that you create and clock in to your "interrupt" task on your return, then adjust the starting clock time of that interrupt task back to when you were actually interrupted.

If you use M-S-Up and M-S-Down on the CLOCK line of your interrupt task then, in addition to adjusting that clock time, it will also adjust the clock entry of the previously clocked-in task. In your scenario this would therefore adjust the end of "Clock-in" as it was adjusting the start time of "Interrupt".