Impress after releasing singular song (3)
I believe the answer is:
lay
'song' is the definition.
(lay is a kind of song)
'impress after releasing singular' is the wordplay.
'impress' becomes 'slay' (slang term meaning impress or dazzle).
'after releasing' indicates named letters should be taken away.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'slay' with 's' taken out is 'LAY'.
(Other definitions for lay that I've seen before include "Set (table)" , "bed" , "Place on a surface" , "like a minister? On the contrary" , "Arrange" .)