Naiad on island has Greek youth covered (6)
I believe the answer is:
adonis
'greek youth covered' is the definition.
I can't judge whether this defines the answer.
'naiad on island has' is the wordplay.
'has' indicates the answer is hidden within the clue.
'ADONIS' is hidden within 'naiad on island'.
Can you help me to learn more?
(Other definitions for adonis that I've seen before include "A very handsome legendary Greek" , "lovely man" , "Extremely attractive young man from Greek mythology" , "Aphrodite's love" , "Hunk" .)