Change bodice hard to be ignored (5)
I believe the answer is:
alter
'change' is the definition.
(I know that change can be written as alter)
'bodice hard to be ignored' is the wordplay.
'bodice' becomes 'halter' (both can mean the upper part of a dress).
'hard' becomes 'h' (abbreviation used in pencil classifications).
'to be ignored' is a deletion indicator.
'halter' with 'h' taken out is 'ALTER'.
(Other definitions for alter that I've seen before include "shift" , "and 10 Across: Second self" , "Alert to change" , "Vary" , "Change, modify" .)