Crossword Genius

Fish out of a can (4)

Ross

I believe the answer is:

sild

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

'fish' is the definition.
(sild is a kind of fish)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for sild that I've seen before include "Small herring" , "Young herring" , "young swimmers" , "Young fish" .)

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