A cough caught in the chemist's? (3)
I believe the answer is:
hem
'a cough' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'caught in the chemist's?' is the wordplay.
'caught in' indicates the answer is hidden within the clue.
'HEM' is hidden within 'chemists'.
Can you help me to learn more?
(Other definitions for hem that I've seen before include "It draws attention to" , "Express hesitation" , "Bottom of a garment" , "Finished edge of a piece of cloth" , "Double-backed border of a garment" .)