Taste before guzzling fashionable fruit (9)
I believe the answer is:
tangerine
'fruit' is the definition.
(tangerine is a kind of fruit)
'taste before guzzling fashionable' is the wordplay.
'taste' becomes 'tang' (tang is a kind of taste**).
'before' becomes 'ere' (usually literary).
'guzzling' indicates putting letters inside (I've seen this in other clues).
'fashionable' becomes 'in' ('in' can be similar in meaning to 'fashionable').
'ere' placed around 'in' is 'erine'.
'tang'+'erine'='TANGERINE'
(Other definitions for tangerine that I've seen before include "something juicy being given to press" , "fruit product" , "Orange-type fruit" , "Small orange-like fruit (from North Africa?)" , "Taste" .)