Succeed with a weapon and acknowledge the applause (4,1,3)
I believe the answer is:
take a bow
'acknowledge the applause' is the definition.
(an actor bows to acknowledge applause)
'succeed with a weapon' is the wordplay.
'succeed' becomes 'take' ('take' can mean to function successfully).
'with' says to put letters next to each other.
'weapon' becomes 'bow' (bow is a kind of weapon).
'take'+'a'+'bow'='TAKE A BOW'
'and' is the link.
(Other definitions for take a bow that I've seen before include "Before playing, cellist must" , "Acknowledge applause as entertainer does" , "Acknowledge applause with physical posture" , "Violinist's lesson one" , "Acknowledge your audience" .)