Swear about getting new response (6)
I believe the answer is:
answer
'response' is the definition.
(answer is a kind of response)
'swear about getting new' is the wordplay.
'about' indicates anagramming the letters.
'getting' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'swear' anagrammed gives 'aswer'.
'aswer' going around 'n' is 'ANSWER'.
(Other definitions for answer that I've seen before include "fit" , "Respond" , "It could give you a" , "Be satisfactory" , "Serve" .)