Squat sofa has rococo top (6)
I believe the answer is:
crouch
'squat' is the definition.
(to crouch is to squat down)
'sofa has rococo top' is the wordplay.
'sofa' becomes 'couch' (synonyms).
'has' is an insertion indicator.
'rococo top' becomes 'r' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'couch' going around 'r' is 'CROUCH'.
Can you help me to learn more?
(Other definitions for crouch that I've seen before include "Squat" , "Bent knees posture" , "Hunker down" , "shooter?" , "Lower the body with bent knees as if about to spring" .)