Cry due to looking old (8)
I believe the answer is:
yellowed
'old' is the definition.
(similar in meaning)
'cry due' is the wordplay.
'cry' becomes 'yell' (synonyms).
'due' becomes 'owed' (synonyms).
'yell'+'owed'='YELLOWED'
'to looking' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for yellowed that I've seen before include "Discoloured with age" , "showed effects of age" , "Became jaundiced in appearance?" , "Like discoloured paper" .)