A cat - a lion - wandering in part of Spain (9)
I believe the answer is:
catalonia
'in part of spain' is the definition.
(I've seen this before)
'a cat a lion wandering' is the wordplay.
'wandering' indicates anagramming the letters.
'a'+'cat'+'a'+'lion'='acatalion'
'acatalion' anagrammed gives 'CATALONIA'.
(Other definitions for catalonia that I've seen before include "NE region of Spain" , "secessionist area" , "part of Spain" , "autonomous region" .)