Reply (6)

'reply' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for answer that I've seen before include "Response to a question" , "Retort" , "Fulfil" , "What you need" , "Serve" .)
'reply' is the definition.
(retort is a kind of reply)
This is all the clue.
(Other definitions for retort that I've seen before include "Witty/sharp reply" , "Glass vessel used in distilling liquids" , "Make quick or angry reply" , "Sharp riposte" , "Sally" .)
'reply' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for response that I've seen before include "Answer - retort" , "Rejoinder, retort" , "bid by partner" , "Press one for a reply" , "Reaction, reply" .)
'reply' is the definition.
(riposting is a kind of replying)
This is all the clue.
(Other definitions for riposte that I've seen before include "Rejoinder" , "Reply, retort" , "Repartee; quick thrust (fencing)" , "Witty retort" , "Sally" .)
'reply' is the definition.
(synonyms)
This is all the clue.
(Other definitions for respond that I've seen before include "React (positively) to a stimulus or treatment" , "Come back" , "State in reply" , "Reply - react" , "Answer or react" .)