See something useful in the kitchen (3-6)

I believe the answer is:

can-opener

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'see' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'something useful in the kitchen' is the wordplay.
'something' becomes 'can' (I can't explain this - if you can you should give a lot more credence to this answer).
'useful in the kitchen' becomes 'opener' (eg a can opener).
'can'+'opener'='CAN-OPENER'

Can you help me to learn more?

I've seen this clue in The Guardian.

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