Crossword Genius

The first feeble adjustment (5)

Ross

I believe the answer is:

tweak

'adjustment' is the definition.
(I have seen 'Fine adjustment ' mean 'tweak' so perhaps 'adjustment' could also mean 'tweak')

'the first feeble' is the wordplay.
'the first' becomes 't' (wst letter of 'the').
'feeble' becomes 'weak' (similar in meaning).
't'+'weak'='TWEAK'

(Other definitions for tweak that I've seen before include "Change slightly" , "Modify slightly" , "Make fine adjustment" , "Fine tune" , "Nip" .)

I've seen this clue in The Mirror.
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