Measure how fast animal internalises shock treatment (7)
I believe the answer is:
hectare
'measure' is the definition.
(hectare is a kind of measure)
'fast animal internalises shock treatment' is the wordplay.
I cannot quite understand how this works, but
'treatment' could be 'ect' (ECT is an example) and 'ect' is found within the answer.
'animal' could be 'hare' (I have seen 'Swift animal ' mean 'hare' so perhaps 'animal' could also mean 'hare') and 'hare' is found in the leftover letters.
No letters remain.
This explanation may well be incorrect...
'how' acts as a link.
Can you help me to learn more?
(Other definitions for hectare that I've seen before include "Amount of ground" , "The race (anag) - unit of area" , "Ten thousand square metres" , "Teacher of metric land measure" , "10,000 squaer metres" .)