Knock family yokel (7)

I believe the answer is:

bumpkin

'yokel' is the definition.
(I know that yokel can be written as bumpkin)

'knock family' is the wordplay.
'knock' becomes 'bump' (synonyms).
'family' becomes 'kin' (synonyms).
'bump'+'kin'='BUMPKIN'

(Other definitions for bumpkin that I've seen before include "Clumsy rustic" , "Country person with awkward manners" , "Country cousin" , "Simple rustic" , "Peasant" .)

I've seen this clue in The Daily Express.

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