Hear name attached to limerick writer (5)
I believe the answer is:
learn
'hear' is the definition.
(I know that hear can be written as learn)
'name attached to limerick writer' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'attached to' is a charade indicator (letters next to each other).
'limerick writer' becomes 'lear' (Edward Lear wrote limericks).
'n' put after 'lear' is 'LEARN'.
(Other definitions for learn that I've seen before include "Become aware of" , "Discover - study" , "Renal (anag)" , "teach illiterate" , "Study or digest" .)