Swimming pool inspires non-heterosexual desire (6)
I believe the answer is:
libido
'desire' is the definition.
(libido is a kind of desire)
'swimming pool inspires non-heterosexual' is the wordplay.
'swimming pool' becomes 'lido' (lido is a type of open-air swimming pool).
'inspires' is an insertion indicator (inspire means to breathe in).
'non heterosexual' becomes 'bi' (I can't justify this - if you can you should believe this answer much more).
'lido' placed around 'bi' is 'LIBIDO'.
Can you help me to learn more?
(Other definitions for libido that I've seen before include "Strong urge" , "Sexual drive" , "Freud's sex drive" , "Psychic, sexual, energy" , "Emotional energy associated with sexual desire" .)