Prepare to destroy tray edge (3,5)
I believe the answer is:
get ready
'prepare' is the definition.
(synonyms)
'destroy tray edge' is the wordplay.
'destroy' indicates anagramming the letters (I've seen this in other clues).
'tray'+'edge'='trayedge'
'trayedge' is an anagram of 'GET READY'.
'to' acts as a link.
(Other definitions for get ready that I've seen before include "Prepare oneself" , "third of three" .)