Checker finds evidence on lecturer (11)
I believe the answer is:
proofreader
'checker' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'evidence on lecturer' is the wordplay.
'evidence' becomes 'proof' (evidence proves something).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'lecturer' becomes 'reader' (synonyms).
'proof'+'reader'='PROOFREADER'
'finds' is the link.
Can you help me to learn more?
(Other definitions for proofreader that I've seen before include "one marking scripts" , "Text checker" , "one who a publisher employs?" .)