Stoppage is a hit (6)
I believe the answer is:
strike
I believe this is a double definition.
'stoppage' is the first definition.
(thesaurus)
'a hit' is the second definition.
(I know that hit can be written as strike)
'is' is the link.
(Other definitions for strike that I've seen before include "Industrial dispute - everybody out" , "Do this while the iron is hot" , "Hit out in industrial dispute" , "Downing of tools" , "coin" .)