Memorable industrial action (8)
I believe the answer is:
striking
This clue might be a double definition.
'memorable' is the first definition.
(thesaurus)
'industrial action' is the second definition.
'striking' can be an answer for 'action' (striking is a kind of action). I am unsure of the 'industrial' bit.
Can you help me to learn more?
(Other definitions for striking that I've seen before include "Conspicuous" , "downing tools" , "Noticeable" , "Delivering a blow" , "Hitting or refusing to work" .)