Head of huge wildebeest lifted and dropped (4)
I believe the answer is:
hung
'dropped' is the definition.
(hanging is a kind of dropping)
'head of huge wildebeest lifted' is the wordplay.
'head of' says to take the initial letters.
'wildebeest' becomes 'gnu' (synonyms).
'lifted' is a reversal indicator (going up in down clue).
The first letter of 'huge' is 'h'.
'gnu' in reverse letter order is 'ung'.
'h'+'ung'='HUNG'
'and' acts as a link.
(Other definitions for hung that I've seen before include "Suspended" , "(Of a painting) exhibited (in a gallery)" , "(Of parliament) with no overall majority" , "(Of a jury) unable to agree on a verdict" , "Dangled" .)