Fool takes son in dance (5)
I believe the answer is:
twist
'dance' is the definition.
(twisting is a kind of dancing)
'fool takes son' is the wordplay.
'fool' becomes 'twit' (I've seen this before).
'takes' indicates putting letters inside.
'son' becomes 's'.
'twit' going around 's' is 'TWIST'.
'in' is the link.
(Other definitions for twist that I've seen before include "Dance - unexpected turn" , "Deal me another card! - distort" , "1960s' dance craze" , "another card, please" , "Dance; defraud" .)