Disturbed and elderly, eating junk after lunchtime? (8)
I believe the answer is:
agitated
'disturbed' is the definition.
(agitating is a kind of disturbing)
'elderly eating junk after lunchtime?' is the wordplay.
'elderly' becomes 'aged' ('aged' can be a synonym of 'elderly').
'eating' means one lot of letters goes inside another.
'junk' becomes 'tat' (I've seen this before**).
'after' is a charade indicator (letters next to each other).
'lunchtime?' becomes 'i' (tpm could be I on a clock with Roman numerals).
'tat' put after 'i' is 'itat'.
'aged' going around 'itat' is 'AGITATED'.
'and' is the link.
(Other definitions for agitated that I've seen before include "in troubled state" , "Tried to stir up public opinion" , "Physically upset" , "Troubled, perturbed" , "caused a stir" .)