Cheers after recall of song line (5)
I believe the answer is:
riata
'line' is the definition.
(riata is a kind of line)
'cheers after recall of song' is the wordplay.
'cheers' becomes 'ta' (I've seen this in other clues).
'after' is a charade indicator (letters next to each other).
'recall of' is a reversal indicator.
'song' becomes 'air' (I've seen this before**).
'air' reversed gives 'ria'.
'ta' after 'ria' is 'RIATA'.
(Other definitions for riata that I've seen before include "Lariat made from strange tiara" , "Spanish lariat" , "Tiara turned into a cowboy's rope" , "Rope with noose" , "lasso" .)