Weird Scots rook inside the Spanish moat? (8)
I believe the answer is:
eldritch
'weird scots' is the definition.
(I've seen this before)
'rook inside the spanish moat?' is the wordplay.
'rook' becomes 'r' (abbreviation in chess).
'inside' is an insertion indicator.
'the spanish' becomes 'el' ('the' in Spanish).
'moat?' becomes 'ditch' (moat is a kind of ditch).
'el'+'ditch'='elditch'
'r' put within 'elditch' is 'ELDRITCH'.
(Other definitions for eldritch that I've seen before include "Spooky" , "Weird Scots" , "Weird Scottish" , "Weird, sinister, ghostly" .)