...take over and pass muster (5,2)
I believe the answer is:
stand up
'pass muster' is the definition.
(thesaurus)
'take over' is the wordplay.
'take' becomes 'stand' (I can't justify this - if you can you should believe this answer much more).
'over' becomes 'up' (e.g. if your time is up it is over).
'stand'+'up'='STAND-UP'
'and' is the link.
Can you help me to learn more?
(Other definitions for stand up that I've seen before include "Survive examination" , "Rise - be valid" , "one has to sit? Not at all" , "Variety of comedy" , "sort of routine" .)