Catch it in carp’s close season (7)

I believe the answer is:

pitfall

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'catch' is the definition.
(thesaurus)

'it in carp's close season' is the wordplay.
'in' means one lot of letters goes inside another.
'carp's close' becomes 'p' (I am not sure about this - if you are sure you should believe this answer much more).
'season' becomes 'fall' (alternative name for autumn).
'p'+'fall'='pfall'
'it' placed into 'pfall' is 'PITFALL'.

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(Other definitions for pitfall that I've seen before include "Hidden danger or difficulty" , "Unexpected difficulty or danger" , "Hazard" , "Trap in the form of a concealed hole" , "Unforeseen difficulty" .)

I've seen this clue in The Sunday Times.

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