Wickedly steal from the poorest (5)
I believe the answer is:
least
'poorest' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'wickedly steal' is the wordplay.
'wickedly' indicates an anagram (I've seen this in other clues).
'steal' is an anagram of 'LEAST'.
'from the' acts as a link.
Can you help me to learn more?
(Other definitions for least that I've seen before include "Lowest amount" , "Smallest, slightest" , "Lowest or smallest" , "Smallest, being stale" , "Most unimportant" .)