Blundering on, prince acted foolishly (8-5)
I believe the answer is:
accident-prone
'blundering on prince acted foolishly' is the definition.
I can't tell whether this defines the answer.
'on prince acted foolishly' is the wordplay.
'foolishly' indicates an anagram.
'on'+'prince'+'acted'='onprinceacted'
'onprinceacted' anagrammed gives 'ACCIDENT-PRONE'.
Can you help me to learn more?
(Other definitions for accident-prone that I've seen before include "Susceptible to mishap" , "Given to mishaps" , "Unusually susceptible to mishaps" , "Given to misadventure" , "With a Tendency to suffer misfortune" .)