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Bob Mortimer's one to catch zero carp (4)

Ross

I believe the answer is:

moan

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'carp' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Maybe there's an association between them I don't understand?

'bob mortimer's one to catch zero' is the wordplay.
'bob mortimer' becomes 'm' (I can't explain this - if you can you should give a lot more credence to this answer).
'one' becomes 'an' (an apple is one apple).
'to catch' is an insertion indicator.
'zero' becomes 'O' (O resembles 0).
'm'+'an'='man'
'man' placed around 'o' is 'MOAN'.

Can you help me to learn more?

(Other definitions for moan that I've seen before include "Express pain" , "Keen" , "Whinge" , "Murmur of pain; grumble" , "Bewail" .)

I've seen this clue in The Times.
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