Thanks for this imagcq.
1) A lot of cheese has revolutionary bounce (8) - ricochet? Majority of ricotta- cheese , with Che - revolutionary, gives ricochet- bounce?
2) Laid up in bed, ship's officer will lose heart for sure (3/2/5) I'll be bound? Ill - laid up + ship's officer - bosun, losing heart - boun, in bed gives I'll be boun d - for sure?
3) A heartless untruth, trouble for fanatic (10) aficionado? A + fic(t)ion + ado?
4) Gold plated china-Romeo airs as appearing inept (7) amateur? Gold - au + r- Romeo + mate- china gives a mate u r?
This gives RTIDAOAR, which gives RADIATOR?