To-do with bishop Basil, perhaps? (3,4)
I believe the answer is:
pot herb
'basil perhaps?' is the definition.
(basil is an example)
'to-do with bishop' is the wordplay.
'to-do with' becomes 'pother' (I can't explain this - if you can you should believe this answer much more).
'bishop' becomes 'B' (chess abbreviation).
'pother'+'b'='POT-HERB'
Can you help me to learn more?
(Other definitions for pot herb that I've seen before include "Vegetable adding flavour" , "sage, perhaps" , "culinary plant" .)