Choose a new pot (3)
I believe the answer is:
opt
'choose' is the definition.
(both can mean to pick something)
'a new pot' is the wordplay.
'a new' is an anagram indicator.
'pot' is an anagram of 'OPT'.
(Other definitions for opt that I've seen before include "Make a choice" , "Hold in the highest esteem" , "Decide between possibilities, choose" , "Elect" , "Plump for" .)