Curly and very short, in fashion (4)
I believe the answer is:
wavy
'curly' is the definition.
('wavy' can be similar in meaning to 'curly')
'very short in fashion' is the wordplay.
'short' suggests taking the first letters.
'in' indicates putting letters inside.
'fashion' becomes 'way' ('way' can be a synonym of 'fashion'**).
The initial letter of 'very' is 'v'.
'v' put inside 'way' is 'WAVY'.
'and' acts as a link.
(Other definitions for wavy that I've seen before include "Rippled" , "Undulating" , "Sinuous" , "Curly (hair)" , "full of bends" .)