Dispenser taking lid off medicine, one put in box (7)
I believe the answer is:
chemist
'dispenser' is the definition.
(I've seen this before)
'medicine one put in box' is the wordplay.
'medicine' becomes 'm' (this could be a standard abbreviation which I don't know about).
'one' becomes 'i' (Roman numeral).
'put in' is an insertion indicator.
'box' becomes 'chest' (chest is a kind of box).
'm'+'i'='mi'
'mi' inserted within 'chest' is 'CHEMIST'.
'taking lid off' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for chemist that I've seen before include "Faraday, for example" , "man of science" , "Scientist; type of shop" , "Shop selling medicines" , "Drugstore" .)