Type of industrial action (2-4)
I believe the answer is:
go-slow
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of industrial action</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for go-slow that I've seen before include "Work-to-rule" , "Type of industrial action" , "Form of industrial action" .)