Hint: coarse, initially sexist, joke is finely drawn out (4,4)

'finely drawn out' is the definition.
I know nothing about this answer so I can't judge whether this works.

'hint coarse initially sexist joke' is the wordplay.
'coarse' is an anagram indicator.
'initially' suggests taking the first letters.
'joke' becomes 'pun' (punning is a kind of joking**).
The initial letter of 'sexist' is 's'.
'hint' is an anagram of 'thin'.
'thin'+'s'+'pun'='THIN-SPUN'

'is' is the link.

Can you help me to learn more?