Grant vaguely suggests what analgesics do? (5)
I believe the answer is:
endow
'grant' is the definition.
(thesaurus)
'vaguely suggests what analgesics do?' is the wordplay.
I cannot quite understand how this works, but
'do?' could be 'do' and 'do' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for endow that I've seen before include "Present with a source of income" , "Set up with money" , "supply" , "Pay to found" , "Provide with a permanent income - perhaps a college" .)