Try handmade connection for firehose (7)
I believe the answer is:
hydrant
'try' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for hydrant that I've seen before include "It connects a hose to the water main" , "Firemen's water point" , "Water-pipe on the street for the fire brigade" , "Connection for attaching hose to water-main" , "Water source" .)