Appears to be weaving machines (5)
I believe the answer is:
looms
I believe this clue is a double definition.
'appears' is the first definition.
(looming is a kind of appearing)
'weaving machines' is the second definition.
(machines for weaving fabric)
'to be' is the link.
(Other definitions for looms that I've seen before include "appears indistinctly" , "More than one machine" , "Rises threateningly ahead with weaving machines" .)