Unusually clean around the Spanish housing (7)
I believe the answer is:
nacelle
'housing' is the definition.
(I know that nacelle is a type of housing)
'unusually clean around the spanish' is the wordplay.
'unusually' indicates an anagram.
'around' means one lot of letters goes inside another.
'the spanish' becomes 'el' ('the' in Spanish).
'clean' with letters rearranged gives 'nacle'.
'nacle' enclosing 'el' is 'NACELLE'.
(Other definitions for nacelle that I've seen before include "car" , "Aircraft engine fairing" , "Aircraft engine casing" , "airship's gondola" , "Streamlined cover for an aircraft engine" .)