Article by head of monastery on an uplifting song (6)
I believe the answer is:
anthem
'uplifting song' is the definition.
(I've seen this before)
'article by head of monastery on an' is the wordplay.
'article' becomes 'the' (the 'definite article' part of speech**).
'by' is a charade indicator (letters next to each other).
'head of' suggests taking the first letters.
'on' is a charade indicator (letters next to each other).
The first letter of 'monastery' is 'm'.
'the' put next to 'm' is 'them'.
'them' after 'an' is 'ANTHEM'.
(Other definitions for anthem that I've seen before include "Song of praise or loyalty" , "Solemn song" , "National or church song" , "air of patriotism?" , "Hymn of loyalty" .)