Language of love (7)
I believe the answer is:
romance
I believe this is a double definition.
'language' is the first definition.
(Romance is an example)
'love?' is the second definition.
(I know that romance is a type of Love)
'of' acts as a link.
(Other definitions for romance that I've seen before include "Sentimental affair in Menorca" , "Feeling of mystery; love affair" , "Love-story" , "Various languages such as French" , "fairy story?" .)