Provincial leader called for transport strike (5)
I believe the answer is:
prang
'transport strike' is the definition.
(prang can a vehicle crash)
'provincial leader called' is the wordplay.
'leader' indicates taking the first letters.
'called' becomes 'rang' (called on the phone).
The first letter of 'provincial' is 'p'.
'p'+'rang'='PRANG'
'for' acts as a link.
(Other definitions for prang that I've seen before include "Crash (a car, aircraft) (colloq.)" , "Plane or car crash" , "Car accident, usually not too serious" , "Crash (a motor vehicle)" , "nasty collision" .)