Note between fa and la (3)
I believe the answer is:
sol
'note between fa and la' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sol that I've seen before include "Mexican lager" , "Personification of the sun" , "Fifth note of scale" , "Spanish and poetic sun" , "Note - colloid - the Sun" .)