Island magicians get no approval for napping and thinking (9)
I believe the answer is:
imagining
'thinking' is the definition.
('imagine' can be a synonym of 'think')
'island magicians get no approval for napping and' is the wordplay.
I cannot really understand how this works, but
'island' could be 'i' (geographical abbreviation) and 'i' is found within the answer.
'magicians' could be 'magi' (magus is a kind of magician) and 'magi' is located in the answer.
'no' could be 'n' (common abbreviation y/n) and 'n' is found in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for imagining that I've seen before include "Fantasising" , "Fancying" , "Thinking up" , "Supposing, assuming" , "illusion?" .)