Ready to accommodate Cuba’s deal (4)
I believe the answer is:
pact
'deal' is the definition.
(I've seen this before)
'ready to accommodate cuba's' is the wordplay.
'ready' becomes 'pat' (I've seen this in another clue).
'to accommodate' means one lot of letters goes inside another.
'cuba' becomes 'c'.
'pat' enclosing 'c' is 'PACT'.
(Other definitions for pact that I've seen before include "Written agreement between two states" , "Formal agreement between parties or states" , "Alliance" , "Treaty, formal agreement" , "Settlement" .)