We rest a high jumper (7)
I believe the answer is:
sweater
'jumper' is the definition.
(I've seen this before)
'we rest a high' is the wordplay.
'high' indicates anagramming the letters (can mean drunk or on drugs and hence disordered).
'we'+'rest'+'a'='weresta'
'weresta' is an anagram of 'SWEATER'.
(Other definitions for sweater that I've seen before include "person in a sauna?" , "Woolly" , "Knitted upper garment" , "Jersey may become" , "Re waste: it's a garment" .)