Uprising in Africa is alienating continent (4)
I believe the answer is:
asia
'continent' is the definition.
(Asia is an example)
'uprising in africa is alienating' is the wordplay.
'uprising' says the letters should be written backwards.
'in' indicates the answer is hidden within the clue.
'aisa' can be found hidden inside 'africa is alienating'.
'aisa' written backwards gives 'ASIA'.
(Other definitions for asia that I've seen before include "lands in the east" , "Heavily populated area" , "Earth's largest continent" , "Thailand and its location" , "Large area" .)