The woman's covering part of body — what is that part? (6)
'body what is that part?' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'the woman's covering part' is the wordplay.
'the woman' becomes 'her' (pronoun for a woman).
'covering' means one lot of letters goes inside another.
'part' becomes 'ear' (ear is a kind of part).
'her' going around 'ear' is 'HEARER'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for hearer that I've seen before include "One listening", "auditor", "Listener".)