Left to inspire a couple of learners stumped in calculus (9)
I believe the answer is:
gallstone
'calculus' is the definition.
(I know that gallstone is a type of calculus)
'left to inspire a couple of learners stumped' is the wordplay.
'left' becomes 'gone' (go can mean to leave).
'to inspire' means one lot of letters goes inside another (breathe in).
'a couple of learners' becomes 'all' (I can't explain this - if you can you should believe this answer much more).
'stumped' becomes 'st' (cricket abbreviation).
'all'+'st'='allst'
'gone' enclosing 'allst' is 'GALLSTONE'.
'in' is the link.
Can you help me to learn more?
(Other definitions for gallstone that I've seen before include "Small hard secretion formed in the body" , "Problem for bile ducts" , "Let Anglos suffer with small hard mass in body" , "It's removed in hospital" , "Concretion of cholesterol, lime salts, etc" .)