It's scarce starting for all sides today (5)
I believe the answer is:
short
'it's scarce' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for short that I've seen before include "Terse; in insufficient supply" , "Curt" , "Concise" , "Neat" , "Wanting" .)