Move on beat — to this? (5)
I believe the answer is:
tango
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'move on beat' is the wordplay.
'move' becomes 'go' (to go is to move).
'on' means one lot of letters go next to another.
'beat' becomes 'tan' (I've seen this before).
'go' put after 'tan' is 'TANGO'.
'to' is the link.
(Other definitions for tango that I've seen before include "T in radio alphabet" , "Colourful dance from Argentina" , "Tonga (anag.)" , "Latin American dance takes two to do it" , "musical piece" .)