One member's naughty children (4)

I believe the answer is:

imps

'naughty children' is the definition.
(I've seen this before)

'one member's' is the wordplay.
'one' becomes 'i' (Roman numeral).
'member's' becomes 'MP's' (Member of Parliament).
'i'+'mps'='IMPS'

(Other definitions for imps that I've seen before include "Naughty sprites" , "Demons" , "Mischievous characters" , "Cheeky little devils" , "Little mischievous devils" .)

I've seen this clue in The Guardian.

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