Hillary and Donald finally married in nude? Revolting! (6)
I believe the answer is:
edmund
'hillary' is the definition.
(explorer Edmund Hillary, 1918-2008)
'donald finally married in nude? revolting' is the wordplay.
'finally' says to take the final letters.
'married' becomes 'm' (abbreviation, e.g. in genealogy).
'in' is an insertion indicator.
'revolting' is a reversal indicator.
The last letter of 'donald' is 'd'.
'm' placed within 'nude' is 'numde'.
'd'+'numde'='dnumde'
'dnumde' back-to-front is 'EDMUND'.
'and' is the link.
(Other definitions for edmund that I've seen before include "St. - - the Martyr" , "- Ironside, English king" , "Part of 1 25 [KING LEAR]" , "Saint of Oxford college (or Bury)" , "-- Hillary; -- Spenser" .)