Dash away with the pin (4)
I believe the answer is:
bolt
This could be a double definition.
'dash away' is the first definition.
'bolt' can be an answer for 'dash' (thesaurus). I'm not sure about the 'away' bit.
'the pin' is the second definition.
(thesaurus)
'with' is the link.
Can you help me to learn more?
(Other definitions for bolt that I've seen before include "Eat hurriedly" , "Run away suddenly; long fixing pin" , "Find a bar" , "From the blue, it's a big surprise" , "Short arrow for a crossbow" .)