One leapt high, as a Springbok (8)
I believe the answer is:
antelope
'a springbok' is the definition.
(thesaurus)
'one leapt high' is the wordplay.
'high' indicates anagramming the letters (can mean drunk or on drugs and hence disordered).
'one'+'leapt'='oneleapt'
'oneleapt' is an anagram of 'ANTELOPE'.
'as' is the link.
(Other definitions for antelope that I've seen before include "Lean poet (anag.)" , "Eg, gazelle or gnu" , "Wild creature" , "One petal for this animal" , "eg Eland" .)