Mother Brown accommodating Basil? (4)
I believe the answer is:
herb
'basil?' is the definition.
(basil is an example)
'mother brown accommodating' is the wordplay.
'accommodating' says the answer is hidden in the clue.
'HERB' is hidden in the letters of 'mother brown'.
(Other definitions for herb that I've seen before include "Savoury plant" , "plant with useful properties" , "Type of plant used in medicine" , "ingredient for recipe?" , "Rosemary, for example" .)