Obsequious? No city chaps can be so! (11)
I believe the answer is:
sycophantic
'obsequious?' is the definition.
(synonyms)
'no city chaps can be so' is the wordplay.
'can be so' is an anagram indicator.
'no'+'city'+'chaps'='nocitychaps'
'nocitychaps' is an anagram of 'SYCOPHANTIC'.
(Other definitions for sycophantic that I've seen before include "Unctuous" , "tending to fawn" , "Canaries were once so" , "Servile - like a crawler" , "Crawling" .)