Annoy divorcee worried about stewed pears (10)
I believe the answer is:
exasperate
'annoy' is the definition.
(I've seen this before)
'divorcee worried about stewed pears' is the wordplay.
'divorcee' becomes 'ex' (I've seen this in other clues).
'worried' becomes 'ate' (something worrying may eat someone up).
'about' is an insertion indicator.
'stewed' indicates anagramming the letters.
'pears' anagrammed gives 'spera'.
'ate' placed around 'spera' is 'asperate'.
'ex'+'asperate'='EXASPERATE'
(Other definitions for exasperate that I've seen before include "Drive to distraction" , "Annoy" , "Infuriate" , "See axe part (anag.)" , "bug" .)