One from sultanate soon to be recalled (5)
I believe the answer is:
omani
'one from sultanate' is the definition.
(citizen of Oman)
'soon to be recalled' is the wordplay.
'soon' becomes 'inamo' (in a mo).
'to be recalled' is a reversal indicator.
'inamo' back-to-front is 'OMANI'.
(Other definitions for omani that I've seen before include "Asian" , "Speaker of Arabic" , "Eg, a native of Muscat" , "coming from the Middle East" , "Someone from Muscat" .)