Hymn is able to delight, though king has left (8)
I believe the answer is:
canticle
'hymn' is the definition.
(I know that canticle is a type of hymn)
'able to delight though king has left' is the wordplay.
I cannot really understand how this works, but
'able' could be 'can' and 'can' is found within the answer.
'left' could be 'l' (common abbreviation) and 'l' is found in the answer.
The remaining letters 'tice' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'is' acts as a link.
Can you help me to learn more?
(Other definitions for canticle that I've seen before include "Short hymn" , "Liturgical song" , "Bible-derived song or prayer" , "eg Magnificat" , "A religious song" .)