Crossword Genius

Like a fish eating object with derision (10)

Ross

I believe the answer is:

scathingly

'with derision' is the definition.

'like a fish eating object' is the wordplay.
'like a fish' becomes 'scaly' (fish have scales).
'eating' means one lot of letters goes inside another.
'object' becomes 'thing'.
'scaly' enclosing 'thing' is 'SCATHINGLY'.

I've seen this clue in The Guardian.
Want a hint initially instead of a full solution? Install my app