Speed at which economic measure may be blown up (4,2,9)
I believe the answer is:
rate of inflation
'speed at which economic measure may be blown up' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'speed at which economic measure' is the wordplay.
I cannot really understand how this works, but
'speed' could be 'rate' (both can mean pace) and 'rate' is present in the answer.
'at' could be 'on' (location) and 'on' is found in the answer.
'measure' could be 'fin' (fin is a kind of measure) and 'fin' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?