Crossword Genius

Do well to shut up! (7)

Ross

I believe the answer is:

confine

'shut up' is the definition.
(thesaurus)

'do well' is the wordplay.
'do' becomes 'con'.
'well' becomes 'fine' ('fine' can be similar in meaning to 'well').
'con'+'fine'='CONFINE'

'to' is the link.

(Other definitions for confine that I've seen before include "Limit" , "Shut in" , "Imprison" , "Incarcerate" , "Keep within limits" .)

I've seen this clue in The Telegraph.
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