Love to examine old language (5)
I believe the answer is:
oscan
'old language' is the definition.
(I've seen this before)
'love to examine' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'to examine' becomes 'scan' (scanning is a kind of examining).
'o'+'scan'='OSCAN'
(Other definitions for oscan that I've seen before include "Old tongue" , "old Italian" , "Ancient tongue" , "old language" , "Veteran Italian" .)