### Clue: Comparatively stupid baronet stuck in one river before another (7)
### Answer: OBTUSER 
 ### Explanation: Definition: Comparatively stupid
  [BT(abbrev. for baronet) **contained in**(stuck in) OUSE(the river – more than one with the same name – in England,one river)] ***placed before***(before) R{abbrev. for (another) river}.