Effigies in London hospital (4)
I believe the answer is:
guys
'london hospital' is the definition.
(Guy's Hospital is a London hospital)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for guys that I've seen before include "Chaps, lads" , "people generally" , "Tent ropes; people" , "Burn victims" , "Dolls' partners" .)