Yes from sailor in gay establishment (3)

I believe the answer is:

aye

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'yes from sailor' is the definition.
'aye' can be an answer for 'yes' (I've seen this before). I am not sure about the 'from sailor' bit.

'in gay establishment' is the wordplay.
'in' indicates a hidden word.
'AYE' is hidden within 'gay establishment'.

Can you help me to learn more?

(Other definitions for aye that I've seen before include "Yes; ever" , "Yes, at the double for the sailor" , "Indeed" , "Positive voting response" , "Yes (archaic)" .)

I've seen this clue in The Sun.

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