It makes a very fine trap (6)
I believe the answer is:
spider
This clue might be a double definition.
'it' is the first definition.
The definition suggests a singular noun which matches the answer.
'a very fine trap' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'makes' acts as a link.
Can you help me to learn more?
(Other definitions for spider that I've seen before include "A common arachnid" , "Snooker-cue rest" , "Flycatcher?" , "Webster" , "one with money or house?" .)