Fleece attendant the Spanish brought in (6)
I believe the answer is:
pelage
'fleece' is the definition.
(pelage can mean an animal's fleece)
'attendant the spanish brought in' is the wordplay.
'attendant' becomes 'page' (page is a kind of attendant).
'the spanish' becomes 'el'.
'brought in' means one lot of letters goes inside another.
'page' placed around 'el' is 'PELAGE'.
(Other definitions for pelage that I've seen before include "Wool" , "hair?" .)