Clue: They rescue sick parrots, bandaging heads (4)
Answer: RSPB
Explanation: Definition: They rescue sick parrots, bandaging heads
First letters of Rescue Sick Parrots Bandaging, and kind of &lit: parrots are probably not one of the RSPB's main concerns. The enumeration (4) instead of (1,1,1,1) may be controversial