Be in a hurry to use a punctuation mark (4)
I believe the answer is:
dash
This clue might be a double definition.
'be in a hurry' is the first definition.
'dash' can be an answer for 'hurry' (dash is a kind of hurry). I am unsure of the 'be in a' bit.
'a punctuation mark' is the second definition.
(dash is a kind of punctuation mark)
'to use' is the link.
Can you help me to learn more?
(Other definitions for dash that I've seen before include "rats" , "Hurry; hyphen" , "Hasten; hyphen" , "Hyphen; race" , "Small amount -- move fast" .)