The aged can possibly rely on being led astray (7)
I believe the answer is:
elderly
'the aged' is the definition.
(I've seen this in another clue)
'possibly rely on being led astray' is the wordplay.
I cannot really understand how this works, but
an anagram of 'rely' is 'erly' which is within the answer.
an anagram of 'led' is 'eld' which is present in the answer.
No letters remain.
This explanation may well be incorrect...
'can' acts as a link.
Can you help me to learn more?
(Other definitions for elderly that I've seen before include "Rather old" , "Getting on in years" , "Aged" , "Fairly old, past middle age" , "Old or ageing" .)