Wife following the trend producing creamy sweet (4)
I believe the answer is:
whip
'creamy sweet' is the definition.
(type of dessert)
'wife following the trend' is the wordplay.
'wife' becomes 'w'.
'following the trend' becomes 'hip' (hip can mean trendy or cool).
'w'+'hip'='WHIP'
'producing' acts as a link.
(Other definitions for whip that I've seen before include "Politician who enforces discipline in the party" , "Riding crop" , "Flagellate" , "Lash for driving animals" , "MP enforcing discipline" .)