Some bigwig ran a dancehall in Spanish city (7)
I believe the answer is:
granada
'spanish city' is the definition.
(I've seen this in another clue)
'some bigwig ran a dancehall' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'GRANADA' can be found hidden inside 'bigwig ran a dancehall'.
'in' is the link.
(Other definitions for granada that I've seen before include "sunny city" , "car in > Spanish city" , "Andulasian city" , "Andalusian city" , "Spanish city, site of the Alhambra" .)