Bloke on the radio that vents periodically (6)
I believe the answer is:
geyser
'bloke on the radio that vents periodically' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'bloke on the radio' is the wordplay.
'bloke' becomes 'geezer' (synonyms).
'on the radio' shows a homophone (sound like).
'geezer' is a homophone of 'GEYSER'.
Can you help me to learn more?
(Other definitions for geyser that I've seen before include "Steaming spring" , "It blows off steam" , "A spring sending up columns of hot water" , "Spring that discharges steam and hot water" , "Gas-fired water heater" .)