Haggard heroine managed to net fish for playwright (8)
I believe the answer is:
sheridan
'playwright' is the definition.
(I've seen this before)
'haggard heroine managed to net fish for' is the wordplay.
'haggard heroine' becomes 'she' (I've seen this in another clue).
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to net' means one lot of letters goes inside another.
'fish for' becomes 'id' (I can't justify this - if you can you should believe this answer much more).
'ran' placed around 'id' is 'ridan'.
'she'+'ridan'='SHERIDAN'
Can you help me to learn more?
(Other definitions for sheridan that I've seen before include "Irish playwright (The Rivals)" , "Creator of Mrs Malaprop in The Rivals" , "School for Scandal playwright" , "Irish dramatist" , "Richard Brinsley . . . . . . . . was a great 18th century Irish playwright" .)