### Clue: Skinny vermin almost entirely squashed by upstanding cardinal (6)
### Answer: DERMIC 
 ### Explanation: Definition: Skinny
A charade of DER, a reversal ('upstanding') of RED ('cardinal') plus MIC[e] ('vermin') minus the last letter ('almost entirely'). I suppose that 'squashed by' serves to indicate placed in close contact (or maybe firmly sat upon).