Cucumber her good family consumes (7)
I believe the answer is:
gherkin
'cucumber' is the definition.
(gherkin is a kind of cucumber)
'her good family consumes' is the wordplay.
'good' becomes 'g' (abbreviation).
'family' becomes 'kin' (synonyms).
'consumes' means one lot of letters goes inside another.
'g'+'kin'='gkin'
'her' put inside 'gkin' is 'GHERKIN'.
(Other definitions for gherkin that I've seen before include "Vegetable of the cucumber family" , "Variety of small cucumber" , "Small cucumber pickled whole" , "Salad vegetable - City of London skyscraper" , "Small cucumber, usually pickled" .)