Part of LGBTQ (5)
'part of lgbtq' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gay that I've seen before include "Brightly coloured" , "Homosexual" , "Merry" , "John --, author of 'The Beggar's Opera'" , "Writer of The Beggar's Opera" .)
(Other definitions for queer that I've seen before include "Rum" , "Peculiar" , "Strange, odd" , "Eccentric" , "Unusual" .)