Crossword Genius

Fish cooked inside and covered in oil (6)

Ross

I believe the answer is:

aneled

I'm a little stuck... Click here to teach me more about this clue!

'fish cooked inside and covered' is the definition.
I can't judge whether this definition defines the answer.

'oil' is the wordplay.
I cannot really understand how this works, but
'oil' could be 'anele' (synonyms) and 'anele' is located in the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

'in' is the link.

Can you help me to learn more?

(Another definition for aneled that I've seen is " oiled as before".)

I've seen this clue in The Globe and Mail.
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