Fold layers of wood (3)
I believe the answer is:
ply
'fold' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for ply that I've seen before include "Strand, of wool or wood, say" , "Work steadily at, say trade" , "Laminate thickness" , "carry on" , "This wood is laminated" .)