Refer to everything due to change (6)
I believe the answer is:
allude
'refer to' is the definition.
(I've seen this before)
'everything due to change' is the wordplay.
'everything' becomes 'all' (I've seen this before).
'to change' indicates anagramming the letters.
'due' anagrammed gives 'ude'.
'all'+'ude'='ALLUDE'
(Other definitions for allude that I've seen before include "Refer briefly or indirectly in speaking" , "Make reference to, perhaps indirectly" , "Refe" , "Mention; imply" , "Make indirect reference (to)" .)