Straight into fine attire (4)
I believe the answer is:
neat
'straight' is the definition.
('neat' can be a synonym of 'straight')
'into fine attire' is the wordplay.
'into' says the answer is hidden in the clue.
'NEAT' is hidden in the letters of 'fine attire'.
(Other definitions for neat that I've seen before include "Alcoholic drink without a mixer" , "Ordered; without water" , "bull, eg" , "straight to the barmaid" , "Tidy and spruce" .)