Some Lilliputian impudence (3)
I believe the answer is:
lip
'impudence' is the definition.
(lip is a kind of impudence)
'some lilliputian' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'LIP' is hidden within 'lilliputian'.
(Other definitions for lip that I've seen before include "Top edge of a vessel" , "Edge, rim" , "Edge; impudence" , "It can be read" , "Aural impudence" .)