A peg’s good for repeating (5)

I believe the answer is:

aping

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'repeating' is the definition.
The definition and answer can be both to do with communicating as well as being present participle verbs.
Maybe there's an association between them I don't understand?

'a peg's good' is the wordplay.
'peg' becomes 'pin' (synonyms).
'good' becomes 'g' (abbreviation).
'a'+'pin'+'g'='APING'

'for' is the link.

Can you help me to learn more?

(Other definitions for aping that I've seen before include "Taking off" , "Making copy of" , "Imitating, copying" , "Sending up" , "Trying to repeat" .)

I've seen this clue in The Hindu.

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