Solving problem that a nervous cameraman might have? (7,8)

I believe the answer is:

trouble shooting

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'solving problem' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for trouble shooting that I've seen before include "Solving problem" , "incompetent has at gallery?" .)

I've seen this clue in The Hindu.

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