Charges into wool-growers (4)
I believe the answer is:
rams
'charges' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for rams that I've seen before include "Batters like male sheep?" , "Hits; sheep" , "Bangs into as car might" , "drives" .)