Hi,
10a former cricket captain (5,6) -r-i-,---g--
13d treatment for addition problems (5) ---o-
15d industrial negotiator (14) --l-l-s----e-
i thought this was trouble shooter, but my l comes in with the answer cell (prison room)
I'd think 'troubleshooter' is a pretty good answer for 15d.
In your post, you only give 13 letters for 15d rather than the 14 stated. Also, exactly which letter of the 4-letter answer to 'prison room' crosses precisely which letter of 15d?