Show a certain aptness in profiting (3,2)

I believe the answer is:

fit in

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'show a certain aptness in profiting' is the definition.
I can't judge whether this defines the answer.

'in profiting' is the wordplay.
'in' says the answer is hidden in the clue.
'FIT IN' is hidden within 'profiting'.

Can you help me to learn more?

(Other definitions for fit in that I've seen before include "compatible" , "Conform after adjustment" , "Belong" , "Not be out of place" , "Find time for" .)

I've seen this clue in the Evening Standard.

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