Very small beginnings of tash, if nobbut young (4)

I believe the answer is:

tiny

'very small' is the definition.
(I've seen this before)

'beginnings of tash if nobbut young' is the wordplay.
'beginnings of' indicates taking the first letters.
The first letters of 'tash if nobbut young' is 'TINY'.

(Other definitions for tiny that I've seen before include "Really small" , "Miniscule" , "- - Tim (Dickens)" , "Underdeveloped" , "Little" .)

I've seen this clue in The Independent.

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