Performing a kind of dance, like some beers (2,3)
I believe the answer is:
on tap
'like some beers' is the definition.
(beers may be available on tap)
'performing a kind of dance' is the wordplay.
'performing' becomes 'on' (as in being on stage).
'a kind of dance' becomes 'tap' (tap dancing).
'on'+'tap'='ON TAP'
(Other definitions for on tap that I've seen before include "Of liquid gas, ready to be drawn off" , "where C or H is seen?" , "Available whenever needed" , "Available (for drinking?)" , "Always available" .)