Restricted dancer is not dancing (11)
I believe the answer is:
constrained
'restricted' is the definition.
(constraining is a kind of restricting)
'dancer is not dancing' is the wordplay.
'dancing' is an anagram indicator.
'dancer'+'is'+'not'='dancerisnot'
'dancerisnot' is an anagram of 'CONSTRAINED'.
(Other definitions for constrained that I've seen before include "Appearing forced" , "Besides (archaic)" , "Awkward" , "with shackles on" , "Reticent" .)