Very thirsty chap -- red ordered (7)
I believe the answer is:
parched
'very thirsty' is the definition.
(I've seen this before)
'chap red ordered' is the wordplay.
'ordered' indicates anagramming the letters.
'chap'+'red'='chapred'
'chapred' is an anagram of 'PARCHED'.
(Other definitions for parched that I've seen before include "Dried out by heat" , "Made dry and thirsty" , "Deprived of water" , "Extremely dry" .)