Respond and cater for change (5)
I believe the answer is:
react
'respond' is the definition.
(I've seen this before)
'cater for change' is the wordplay.
'for change' indicates anagramming the letters (I've seen this in other clues).
'cater' is an anagram of 'REACT'.
'and' acts as a link.
(Other definitions for react that I've seen before include "Respond to something" , "Behave in response" , "Change chemically" , "Perform again" , "What a chemical might do" .)