Crowd round a factory (4)
I believe the answer is:
mill
This clue could be a double definition.
'crowd round' is the first definition.
'mill' can be an answer for 'crowd' (thesaurus). I'm not sure about the 'round' bit.
'a factory' is the second definition.
(mill is a type of factory)
Can you help me to learn more?
(Other definitions for mill that I've seen before include "English philosopher and economist, d. 1873" , "Building for grinding corn into flour" , "Plant with facilities for manufacturing" , "Machinery for grinding corn" , "Move around in a confused mass" .)