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 before). I am not certain of the 'part of' bit.
'with two numbers' is the wordplay.
'two numbers' can mean two replacements for 'number'.
'with' means one lot of letters go next to another.
'number' becomes 'pi'.
'number' becomes 'n' (n can represent any number).
'pi'+'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" .)