Kind of language in which lovers are involved (7)
I believe the answer is:
romance
'kind of language' is the definition.
(I've seen this in another clue)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for romance that I've seen before include "Amorous relationship" , "Feeling of mystery; love affair" , "Group of languages" , "Novel - love story" , "Novel (or often its main theme)" .)