In crisis, left small island (4)
I believe the answer is:
isle
'small island' is the definition.
(I've seen this in another clue)
'in crisis left' is the wordplay.
'in' indicates a hidden word.
'ISLE' is hidden within 'crisis left'.
(Other definitions for isle that I've seen before include "Capri for one" , "Insular place" , "Lilliput, say" , "eg Thanet" , "Isolated land" .)