Old people, for instance, going astray (8)
I believe the answer is:
ancients
'old people' is the definition.
(people who lived in ancient times)
'instance going astray' is the wordplay.
'going astray' indicates anagramming the letters.
'instance' is an anagram of 'ANCIENTS'.
'for' is the link.
(Another definition for ancients that I've seen is " Pistol and Iago".)
Want a hint initially instead of a full solution?
Install my app