Occupation of the heartless woman (7)
I believe the answer is:
tenancy
'occupation' is the definition.
(I've seen this before)
'the heartless woman' is the wordplay.
'heartless' says to hollow out the word (remove centre letters).
'woman' becomes 'nancy' (woman's name).
'the' with its centre removed is 'te'.
'te'+'nancy'='TENANCY'
'of' is the link.
(Other definitions for tenancy that I've seen before include "Occupation of rented property" , "Temporary occupation of property" , "residence" , "Letting arrangement" , "Renting arrangement" .)