Seat on elephant who had hiccups (6)
I believe the answer is:
howdah
'seat on elephant' is the definition.
(howdah means a seat for riding an elephant)
'who had hiccups' is the wordplay.
'hiccups' is an anagram indicator (I've seen this in other clues).
'who'+'had'='whohad'
'whohad' with letters rearranged gives 'HOWDAH'.
(Other definitions for howdah that I've seen before include "seat on Jumbo" , "Elephant rider's seat" , "Does it get you high for a trip" , "Canopied elephant seat" , "Seat for an elephant-driver" .)