OAP to sort LED out (7)
I believe the answer is:
oldster
'oap' is the definition.
(both can mean an elderly person)
'sort led out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'sort'+'led'='sortled'
'sortled' with letters rearranged gives 'OLDSTER'.
'to' is the link.
(Other definitions for oldster that I've seen before include "One no longer inexperienced" , "Mature person" , "Elderly person" , "Aged person" , "Wrinkly" .)