Excessively red, moving right as required (2,5)
I believe the answer is:
to order
'as required' is the definition.
(I've seen this before)
'excessively red moving right' is the wordplay.
'excessively' becomes 'too' (to too great a degree).
'moving' indicates an anagram (letters are moved around).
'right' becomes 'r' (abbreviation).
'red' is an anagram of 'rde'.
'too'+'rde'+'r'='TO ORDER'
(Other definitions for to order that I've seen before include "In fulfilment of an instruction" , "as required" , "In accordance with specification" , "As specified" .)