Language parents abroad in Spain love (9)
I believe the answer is:
esperanto
'language' is the definition.
(Esperanto is an example)
'parents abroad in spain love' is the wordplay.
'abroad' is an anagram indicator (letters move around or go abroad).
'in' means one lot of letters goes inside another.
'spain' becomes 'e' (abbreviation for Espana).
'love' becomes 'o' (love means zero in tennis).
'parents' with letters rearranged gives 'sperant'.
'e'+'o'='eo'
'sperant' going inside 'eo' is 'ESPERANTO'.
(Other definitions for esperanto that I've seen before include "in which many could communicate?" , "Personate (anag.)" , "Artificial language invented for international use" , "Dr Zamenhof's language" , "Artificial speech-form" .)