5d. Powerless little devil with nothing but a canvas shelter (8)

Do you feel impotent in the face of cryptic crosswords?  Like to know how to make a start on them?  This half-day session for beginners will look at favourite clue types and tricks of the setters trade (such as anagrams, runs, homophones, omissions and reversals), how to recognise charades and how to set about solving them.