Appear as a weaver (4)
I believe the answer is:
loom
This clue is a double definition.
'appear' is the first definition.
(I know that loom is a type of appear)
'a weaver' is the second definition.
(I've seen this before)
'as' acts as a link.
(Other definitions for loom that I've seen before include "Impend, threaten" , "Impend; weaving machine" , "Machine for weaving yarn" , "Of future event, seem ominously close" , "Weaving - apparatus - overhang" .)