Serve up standard punishment (3)
I believe the answer is:
rap
'punishment' is the definition.
(as in taking the rap for something)
'serve up standard' is the wordplay.
'serve up' shows that the letters should be reversed in order.
'standard' becomes 'par' (standard of play in golf).
'par' reversed gives 'RAP'.
(Other definitions for rap that I've seen before include "Knock sharply" , "Form of music with chanted rhyming lyrics" , "Music; charge; strike" , "Knock loudly" , "Censure" .)