Rascally bear ran to show it! (6)
I believe the answer is:
arrant
'rascally bear ran to show it' is the definition.
I can't tell whether this definition defines the answer.
'rascally bear ran to show' is the wordplay.
'show' indicates the answer is hidden within the clue.
'ARRANT' is hidden within 'rascally bear ran to'.
Can you help me to learn more?
(Other definitions for arrant that I've seen before include "Extreme and utter, as nonsense may be" , "Downright, out-and-out - say nonsense" , "Rat ran badly and became unmitigated" , "Utter and extreme, maybe nonsense" , "Complete (nonsense)" .)