Religious warriors that may be represented as manly aviators (9,4)
I believe the answer is:
salvation army
'religious warriors' is the definition.
(Christian charity group)
'that may be represented as manly aviators' is the wordplay.
'that may be represented as' is an anagram indicator (letters presented in a new way).
'manly'+'aviators'='manlyaviators'
'manlyaviators' anagrammed gives 'SALVATION ARMY'.
(Other definitions for salvation army that I've seen before include "Christian body noted for social work and bands" , "The Booths' organisation" , "The Booths' creation" , "those helping the homeless at Christmas!" , "Charity" .)