Female alien is hot; a thing that gets you going! (6)
I believe the answer is:
fetish
'a thing that gets you going' is the definition.
'fetish' can be an answer for 'a thing' (thesaurus). I'm not certain of the remainder of the definition.
'female alien is hot' is the wordplay.
'female' becomes 'f' (abbreviation).
'alien' becomes 'et' (extra terrestrial).
'hot' becomes 'h'.
'f'+'et'+'is'+'h'='FETISH'
Can you help me to learn more?
(Other definitions for fetish that I've seen before include "Obsession" , "An abnormal object of sexual desire" , "Object worshipped as having a spirit" , "charm" , "thing?" .)