Readjust layout of trees (5)
I believe the answer is:
reset
'readjust' is the definition.
(synonyms)
'layout of trees' is the wordplay.
'layout of' is an anagram indicator.
'trees' is an anagram of 'RESET'.
(Other definitions for reset that I've seen before include "Changed reading" , "Trees (anag)" , "do this to make adjustment" , "Return to original configuration" , "Replanted" .)