Prison misses spirit (9)
I believe the answer is:
maidstone
'prison' is the definition.
(UK prison)
'misses spirit' is the wordplay.
'misses' becomes 'maids' (maid is a kind of miss).
'spirit' becomes 'tone' (synonyms).
'maids'+'tone'='MAIDSTONE'
(Other definitions for maidstone that I've seen before include "Dominates in market town of Kent, England" , "City in Kent" , "Kentish Town" , "County town of Kent" , "Dominates (anag) - English town" .)