Mass producers in awful crush around revolutionary (8)
I believe the answer is:
Here is my best explanation:
'mass producers' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.
'awful crush around revolutionary' is the subsidiary indication.
'awful' indicates anagramming the letters.
'around' indicates putting letters inside.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'crush' anagrammed gives 'churs'.
'churs' going around 'che' is 'churches'.
'in' is the link.
(Other definitions for churches that I've seen before include "places" and "Places of worship".)