The man composed hymn (6)
I believe the answer is:
anthem
'hymn' is the definition.
('anthem' can be a synonym of 'hymn')
'the man composed' is the wordplay.
'composed' indicates anagramming the letters.
'the'+'man'='theman'
'theman' is an anagram of 'ANTHEM'.
(Other definitions for anthem that I've seen before include "Uplifting song -- the man (anag)" , "Song in praise of a nation" , "air of patriotism?" , "National tune" , "Song of praise or loyalty" .)