Capital cricket club in the middle of Nicaragua (5)
I believe the answer is:
accra
'capital' is the definition.
(capital of Ghana)
'cricket club in the middle of nicaragua' is the wordplay.
'cricket club' becomes 'cc' (cricketing abbreviation).
'in the' is an insertion indicator.
'middle of' says to take the centre.
The central letters of 'nicaragua' are 'ara'.
'cc' placed inside 'ara' is 'ACCRA'.
(Other definitions for accra that I've seen before include "African port" , "Ghanaian capital" , "Capital city of Ghana" , "Ghana's capital" , "West African capital" .)