Criticises a revenue-raising measure on radio (7)
I believe the answer is:
attacks
'criticises' is the definition.
(attacking is a kind of criticising)
'on radio' is the wordplay.
'on' becomes 'at' (I've seen this in other clues).
'radio' becomes 'tacks' (I am not sure about this - if you are sure you should believe this answer much more).
'at'+'tacks'='ATTACKS'
'a revenue-raising measure' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for attacks that I've seen before include "Fiercely criticises" , "Assails" , "Assaults" , "Bouts of illness" , "Invades" .)