Girl taking care of Spanish leader (6)
I believe the answer is:
franco
'spanish leader' is the definition.
(I've seen this in another clue)
'girl taking care of' is the wordplay.
'girl' becomes 'fran' ().
'taking' means one lot of letters go next to another.
'care of' becomes 'co' (c/o can mean 'care of' when addressing mail).
'fran'+'co'='FRANCO'
(Other definitions for franco that I've seen before include "Spanish general and dictator" , "Former Spanish dictator" , "was head of state" , "Former Spanish leader" , "General . . . . . . was Spain's last dictator" .)