She gets fruit by the pound (5)
I believe the answer is:
pearl
'she' is the definition.
'fruit by the pound' is the wordplay.
'fruit' becomes 'pear' (pear is a kind of fruit).
'by' means one lot of letters go next to another.
'the pound' becomes 'l'.
'pear'+'l'='PEARL'
'gets' is the link.
(Other definitions for pearl that I've seen before include "Lustrous structure in a mollusc shell" , "Lustrous structure inside an oyster-shell" , "Girl < , pretty" , "Off-white colour" , "greatly valued" .)