Where to seek romance? Blessing in disguise includes brief hint (7,4)

I believe the answer is:

singles club

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'where to seek romance? blessing' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'in disguise includes brief hint' is the wordplay.
I cannot really understand how this works, but
'in' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Guardian.

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