Sewing tools are a sensation! (4,3,7)
I believe the answer is:
pins and needles
'sensation' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for pins and needles that I've seen before include "prickling" , "Numbness" , "discomfort?" , "Penetrating articles" , "Funny feeling" .)