Pound is hit by industrial action (6)
I believe the answer is:
strike
I believe this clue is a triple definition!
'pound' is the first definition.
(thesaurus)
'is hit' is the second definition.
(I've seen this before)
'by' is a link.
'industrial action' is the third definition.
(workers going on strike)
(Other definitions for strike that I've seen before include "Form of industrial action" , "Everyone out" , "Hit at a trade dispute" , "Hit sharply" , "Hit or take industrial action" .)