Loaded skittish eland (5)
I believe the answer is:
laden
'loaded' is the definition.
(I know that loaded can be written as laden)
'skittish eland' is the wordplay.
'skittish' indicates an anagram.
'eland' is an anagram of 'LADEN'.
(Other definitions for laden that I've seen before include "Weighed down with much cargo" , "Filled (with)" , "charged a lot" , "bearing burden" , "Loaded with cargo or burden" .)