Recruit made to abandon demoralised assembly (7)
I believe the answer is:
soldier
'recruit' is the definition.
(thesaurus)
'made to abandon demoralised assembly' is the wordplay.
'to abandon' is a deletion indicator.
'assembly' is an anagram indicator.
'demoralised' with 'made' removed is 'orlised'.
'orlised' anagrammed gives 'SOLDIER'.
(Other definitions for soldier that I've seen before include "Member of army" , "Military person" , "piece of bread" , "One serves in the army" , "Serve" .)