In Managua nobody has manure (5)
I believe the answer is:
guano
'manure' is the definition.
(I know that guano is a type of manure)
'in managua nobody has' is the wordplay.
'has' says the answer is hidden in the clue.
'GUANO' is hidden in the letters of 'in managua nobody'.
(Other definitions for guano that I've seen before include "Bird droppings used as fertiliser" , "Manure from birds - artificial fertiliser from fish" , "Fertiliser made from seabird droppings" , "Manure from seabird or bat" , "business to aid growth" .)