Lively Spanish dance (8)
I believe the answer is:
'lively spanish dance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for fandango that I've seen before include "Spanish Steps" , "Old Spanish dance, with castanets" , "Lively Spanish dance" , "Spanish courtship dance in triple time" , "Dance performed with castanets" .)