Stood on trendy fruit (7)
I believe the answer is:
rosehip
'fruit' is the definition.
(fruit of a rose plant)
'stood on trendy' is the wordplay.
'stood' becomes 'rose' (I've seen this in another clue).
'on' is a charade indicator (letters next to each other).
'trendy' becomes 'hip' (both can mean fashionable).
'rose'+'hip'='ROSEHIP'
(Other definitions for rosehip that I've seen before include "Wild fruit for syrup" , "Fruit of flower used for syrup" , "Fruit on wild plant" , "Wayside fruit" , "Berry for syrup" .)