Part of badge with two numbers (3)
I believe the answer is:
pin
'part of badge' is the definition.
'pin' can be an answer for 'badge' (I've seen this in another clue). I'm not sure about the 'part of' bit.
'with two numbers' is the wordplay.
'two numbers' can mean two replacements for 'number'.
'with' says to put letters next to each other.
'number' becomes 'pi'.
'number' becomes 'n' (n can represent any number).
'pi' next to 'n' is 'PIN'.
Can you help me to learn more?
(Other definitions for pin that I've seen before include "Tack; fasten" , "Hold (down)" , "Flagged stick placed in golf hole" , "Secure" , "Fastener; skittle" .)