Fail to stress indication of softness in some carpeting? (9)
I believe the answer is:
underplay
'fail to stress' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for underplay that I've seen before include "having to act with restraint" , "Reduce stress on" , "Perform (a role) in a restrained way" , "Fail to stress" , "show restraint" .)