Garment style. Very narrow part (1-4)
I believe the answer is:
v-neck
'garment style' is the definition.
'v-neck' can be an answer for 'style' (I have seen 'Style of sweater ' mean 'v-neck' so perhaps 'style' could also mean 'v-neck'). I'm not certain of the 'garment' bit.
'very narrow part' is the wordplay.
I cannot quite see how this works, but
'very' could be 'v' (common abbreviation) and 'v' is located in the answer.
'part' could be 'neck' (neck is a kind of part) and 'neck' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for v-neck that I've seen before include "Type of jumper" , "Type of sweater" , "Sort of sweater" , "Style of sweater" .)