It makes cloth appear indistinct (4)
I believe the answer is:
loom
'it makes cloth appear indistinct' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for loom that I've seen before include "Come into view" , "Apparatus for weaving yarn" , "See 12" , "Textile machine for weaving" , "menacing" .)