Tea from China is not popular (3)
I believe the answer is:
cha
'tea' is the definition.
(cha is a type of tea)
'china is not popular' is the wordplay.
'is not' is a deletion indicator.
'popular' becomes 'in' ('in' can mean trendy).
'china' with 'in' taken out is 'CHA'.
'from' acts as a link.
(Other definitions for cha that I've seen before include "drink" , "Tea (colloquial)" , "Tea (informal)" , "Rosie Lee (slang)" , "not allowed in ski lodge" .)