Soldier follows passion for Spanish folk music (8)
I believe the answer is:
flamenco
'spanish folk music' is the definition.
(type of folk music from Spain)
'soldier follows passion' is the wordplay.
'soldier' becomes 'nco' (non-commissioned officer).
'follows' means one lot of letters go next to another.
'passion' becomes 'flame' (as in the flame of a relationship).
'nco' put after 'flame' is 'FLAMENCO'.
'for' is the link.
(Other definitions for flamenco that I've seen before include "Dance from Andalusia" , "Spanish guitar style" , "Gypsy dance associated with Spain" , "Spanish music style" , "Energetic steps" .)