Key barrier against inundation in the Netherlands (4)
I believe the answer is:
edam
'inundation in the netherlands' is the definition.
The definition suggests a singular noun which matches the answer.
'key barrier against' is the wordplay.
'key' becomes 'e' (musical key).
'barrier' becomes 'dam' (dam is a kind of barrier).
'against' says to put letters next to each other.
'e'+'dam'='EDAM'
Can you help me to learn more?
(Other definitions for edam that I've seen before include "Mild yellow Dutch cheese" , "Kind of cheese" , "Made into popular cheese" , "Dutch market town famous for its cheese" , "edible sphere" .)