Duck down, right into a piece of furniture (6)
I believe the answer is:
crouch
'duck' is the definition.
(I've seen this before)
'down right into a piece of furniture' is the wordplay.
'down right' becomes 'r' (common abbreviation. I am not sure about the 'down' bit.).
'into' is an insertion indicator.
'a piece of furniture' becomes 'couch' (couch is a kind of piece of furniture).
'r' going within 'couch' is 'CROUCH'.
Can you help me to learn more?
(Other definitions for crouch that I've seen before include "Get down low" , "Duck" , "shooter?" , "Bend low, preparing to spring" , "Prepare to spring" .)