All types encountered in this trade? (8)
I believe the answer is:
printing
'all types encountered in this trade?' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'in this trade?' is the wordplay.
I cannot really understand how this works, but
'in' is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for printing that I've seen before include "Handwriting in separate letters" , "making an impression" , "Publishing" , "running off" .)