Pollution is eradicated, partly by this? (7)
I believe the answer is:
ioniser
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'pollution is eradicated partly' is the wordplay.
'partly' indicates the answer is hidden within the clue (part of the clue is used).
'IONISER' is hidden in the letters of 'pollution is eradicated'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for ioniser that I've seen before include "Electrical device purifying air" , "maybe this would improve air quality?" , "Device used to improve air quality in a room" , "Device improving room air quality" , "Device for improving air quality -noisier (anag)" .)