Only half dance in prison (3)
I believe the answer is:
can
'prison' is the definition.
(the can is American slang for prison)
'only half dance' is the wordplay.
'only half' suggests halving the letters.
'dance' becomes 'cancan' (cancan is a kind of dance).
'cancan' with half the letters taken is 'CAN'.
'in' is the link.
(Other definitions for can that I've seen before include "Airtight metal container" , "Container (e.g. beer)" , "Possesses ability" , "Is able; container" , "Cooler" .)