Henry getting fine reduced by 50%? (4)
I believe the answer is:
half
'50%?' is the definition.
(I've seen this before)
'henry getting fine reduced' is the wordplay.
'henry' becomes 'hal' (short for Henry).
'getting' says to put letters next to each other.
'fine reduced' becomes 'f' (abbreviation in pencil classifications; 'reduced' suggests a short form).
'hal'+'f'='HALF'
'by' acts as a link.
(Other definitions for half that I've seen before include "shared round" , "0.5" , "Some football" , "Fifty per cent" , "Wife the better one (joc.)" .)