Came back with the wrong plant outside (8)
I believe the answer is:
retorted
'came back' is the definition.
('retort' can be a synonym of 'come back')
'wrong plant outside' is the wordplay.
'wrong' becomes 'tort' (a civil wrong in law).
'plant' becomes 'reed' (reed is a kind of plant).
'outside' is an insertion indicator.
'tort' put within 'reed' is 'RETORTED'.
'with the' acts as a link.
(Other definitions for retorted that I've seen before include "Made witty response" , "Replied" , "Answered back" , "Came back" , "Made a quick and clever or angry reply" .)