Scourge of outdated hospital equipment (3)
I believe the answer is:
cat
'scourge' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for cat that I've seen before include "Animal - one with nine tails!" , "Animal; converter; boat" , "Malicious gossip" , "Feline mammel" , "Pussy" .)