Sounded impolite and cross (4)
I believe the answer is:
rood
'cross' is the definition.
(rood is a kind of cross)
'sounded impolite' is the wordplay.
'sounded' indicates a 'sounds like' (homophone) clue.
'impolite' becomes 'rude' ('rude' can be similar in meaning to 'impolite').
'rude' is a homophone of 'ROOD'.
'and' is the link.
(Other definitions for rood that I've seen before include "Crucifix in church; one quarter of an acre" , "Crucifix - old unit of area" , "Crucifix on door" , "Old land measure of quarter of an acre" , "Old land measure and large cross in a church" .)