Coshed quite badly in the dance hall (11)
I believe the answer is:
discotheque
'the dance hall' is the definition.
(discotheque is a kind of dance hall)
'coshed quite badly' is the wordplay.
'badly' indicates an anagram.
'coshed'+'quite'='coshedquite'
'coshedquite' with letters rearranged gives 'DISCOTHEQUE'.
'in' is the link.
(Other definitions for discotheque that I've seen before include "Dance club" , "night club" .)