Always available for panto performance (2,3)
I believe the answer is:
on tap
'always available' is the definition.
(I've seen this before)
'panto performance' is the wordplay.
'performance' indicates anagramming the letters.
'panto' anagrammed gives 'ON TAP'.
'for' acts as a link.
(Other definitions for on tap that I've seen before include "readily accessible" , "Always available" , "Available (for drinking?)" , "Where to find a washer" , "Immediately available like beer in pub" .)