Loaded skittish eland (5)
I believe the answer is:
laden
'loaded' is the definition.
('laden' can be a synonym of 'loaded')
'skittish eland' is the wordplay.
'skittish' indicates an anagram.
'eland' anagrammed gives '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" .)