The overseer’s line? (5)
I believe the answer is:
verse
'line?' is the definition.
(verse is a kind of line)
'the overseer's' is the wordplay.
'VERSE' is hidden within the letters.
However, I'm uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for verse that I've seen before include "Poems" , "Stanza; poetry" , "literary offering" , "Poetry - subdivision of the Bible" , "Section of a poem" .)