(as) clean as a (new) pin

US /əz kliːn əz ə njuː pɪn/
UK /əz kliːn əz ə njuː pɪn/
"(as) clean as a (new) pin" picture
1.

very clean or neat

:
•
After she finished cleaning, the kitchen was as clean as a new pin.
•
His car is always kept as clean as a new pin.