Jogger is concerning carer (8)
I believe the answer is:
reminder
'jogger' is the definition.
(something which jogs one's memory)
'concerning carer' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'carer' becomes 'minder' (I can't justify this - if you can you should believe this answer much more).
're'+'minder'='REMINDER'
'is' is the link.
Can you help me to learn more?
(Other definitions for reminder that I've seen before include "Aide-mmoire" , "Knot in handkerchief?" , "Memory refresher" , "Aide-memoire" , "Memory jogger" .)