Give 51 pence for insolence (3)
I believe the answer is:
lip
'insolence' is the definition.
(I've seen this before)
'give 51 pence' is the wordplay.
'give' says to put letters next to each other.
'51' becomes 'li' (roman numeral).
'pence' becomes 'p'.
'li' next to 'p' is 'LIP'.
'for' is the link.
(Other definitions for lip that I've seen before include "Fleshy fold of mouth tissue" , "Impudent talk from part of the face" , "Oral impudence?" , "Rim; impertinence" , "Aural impudence" .)