Troublemaker on the Spanish force (5)
I believe the answer is:
impel
'force' is the definition.
('impel' can be a synonym of 'force')
'troublemaker on the spanish' is the wordplay.
'troublemaker' becomes 'imp' (I've seen this before).
'on' says to put letters next to each other.
'the spanish' becomes 'el'.
'imp'+'el'='IMPEL'
(Other definitions for impel that I've seen before include "Force forwards" , "Motivate" , "Urge or propel" , "Urge forward - push" , "Hold together" .)