Criticism of marijuana’s very fashionable (7)
I believe the answer is:
potshot
'criticism' is the definition.
(potshot is a kind of criticism)
'marijuana's very fashionable' is the wordplay.
'marijuana's' becomes 'pots' ('pot' can be a synonym of 'marijuana').
'very fashionable' becomes 'hot' (I've seen this in other clues. I am not sure about the 'very' bit.**).
'pots'+'hot'='POTSHOT'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for potshot that I've seen before include "Pop" , "random criticism" , "Unfounded criticism" .)