The phrase "ailing industry" refers to an industry or sector of the economy that is not doing well or is experiencing difficulties. It implies that the industry is struggling or in a poor state of health. Full definition
He said that the chamber was working towards assisting some of its members in resuscitating ailing industries in the state. (nigeriapoliticsonline.com)
But he did not rule out help for other ailing industries in future. (theguardian.com)
We started with an order of oysters — farmed locally as a result of the bay's recent efforts to rehabilitate the once ailing industry — along with the crab cakes made with the local Dungeness crab, followed by seared ahi tuna and Pacific swordfish. (theexpeditioner.com)