Sergeants built for glory (9)
I believe the answer is:
greatness
'glory' is the definition.
(thesaurus)
'sergeants built' is the wordplay.
'built' indicates an anagram (the same letters can be used to build the answer).
'sergeants' is an anagram of 'GREATNESS'.
'for' is the link.
(Other definitions for greatness that I've seen before include "Nobility" , "Immensity" , "Large size; sublimity" , "Some achieve it; it's thrust upon others" , "Malvolio wasn't to fear being thrust into?" .)