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