Song about king may be enjoyed (5)
I believe the answer is:
liked
'be enjoyed' is the definition.
(I've seen this before)
'song about king' is the wordplay.
'song' becomes 'lied' (type of German song).
'about' indicates putting letters inside.
'king' becomes 'K' (abbreviation for king in chess).
'lied' going around 'k' is 'LIKED'.
'may' is the link.
(Other definitions for liked that I've seen before include "Enjoyed - popular" , "Appreciated" , "Took pleasure in" , "Was fond of" .)