Mrs Jack Brooksbank not one for Ionesco? (6)
I believe the answer is:
eugene
'one for ionesco?' is the definition.
(I've seen this in another clue)
'mrs jack brooksbank not' is the wordplay.
I cannot really see how this works, but
'mrs' could be 'gene' and 'gene' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for eugene that I've seen before include "Great Irish-American playwright . . . . . . O'Neill" , "Dramatist...... O'Neill wrote 'The Iceman Cometh'" , "opera, but only first half" , "- Onegin (Pushkin)" , ". . . . . . Onegin (Tchaikovsky) (6)" .)