Criticise star with a ''wonder cure'' (7)
I believe the answer is:
panacea
'cure'' is the definition.
(panacea is a kind of cure)
'criticise star with a' is the wordplay.
'criticise' becomes 'pan' (informal term meaning to criticise heavily).
'star' becomes 'ace' (synonyms).
'with' means one lot of letters go next to another.
'pan'+'ace'+'a'='PANACEA'
''wonder' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for panacea that I've seen before include "Universal medicine" , "fixes all complaints" , "Cure for all ills" , "Cure-all in a canape" , "Cure for all things" .)