Ring friend about Spain (4)
I believe the answer is:
peal
'ring' is the definition.
('peal' can be a synonym of 'ring')
'friend about spain' is the wordplay.
'friend' becomes 'pal' (pal is a kind of friend).
'about' indicates putting letters inside.
'spain' becomes 'e' (abbreviation for Espana).
'pal' going around 'e' is 'PEAL'.
(Other definitions for peal that I've seen before include "Prolonged sound of a bell" , "Sound of bells or laughter" , "Set of church bells" , "Loud ringing of bells" , "Deep prolonged sound" .)