Abstainer takes in very small chirp (5)

I believe the answer is:

'chirp' is the definition.
(I know that chirp can be written as tweet)

'abstainer takes in very small' is the wordplay.
'abstainer' becomes 'TT' (short for teetotaller, someone who avoids alcohol).
'takes in' indicates putting letters inside.
'very small' becomes 'wee' ('wee' is a Scottish word for small).
'tt' placed around 'wee' is 'TWEET'.

(Other definitions for tweet that I've seen before include "Chirp of a small bird" , "throwaway message?" , "Twitter" , "Note of a small bird" , "Note from flier" .)

I've seen this clue in The Irish Independent.

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