Single gin & T, stirred and sparkling (10)
I believe the answer is:
glistening
'sparkling' is the definition.
(thesaurus)
'single gin t stirred' is the subsidiary indication.
'stirred' indicates anagramming the letters.
'single'+'gin'+'t'='singlegint'
'singlegint' anagrammed gives 'glistening'.
'and' is the link.
(Other definitions for glistening that I've seen before include "having a sparkle" , "flashy" .)