It may serve to let us in perhaps (7)

I believe the answer is:

utensil

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'it may serve' is the definition.
The definition suggests a singular noun which matches the answer.

'let us in perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'let'+'us'+'in'='letusin'
'letusin' anagrammed gives 'UTENSIL'.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for utensil that I've seen before include "Handy kitchen tool" , "Mandolin, perhaps" , "E.g. colander" , "A kitchen pot or pan" , "Implement, maybe in kitchen" .)

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

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