Angel travelling in Asia to provide relief from suffering (9)
I believe the answer is:
analgesia
'relief from suffering' is the definition.
'angel travelling in asia' is the wordplay.
'travelling' is an anagram indicator.
'in' indicates putting letters inside.
'angel' anagrammed gives 'nalge'.
'nalge' placed within 'asia' is 'ANALGESIA'.
'to provide' acts as a link.
(Other definitions for analgesia that I've seen before include "Painlessness" , "Loss of pain" , "The relief of pain by drugs" , "Inability to feel pain" , "Absence of pain" .)