### Clue: RAF squadron's cleaners seen accepting a degree (3,7)
### Answer: DAM BUSTERS 
 ### Explanation: Definition: RAF squadron
 DUSTERS(cleaners/implements for cleaning off, well, dust) **containing**I(seen accepting) [A + MB(abbrev. for "Bachelor of Medicine", a medical degree).
Defn: … responsible for bombing German dams in WW2.