[TYPO3] Delete <p> tag inside tt_news table cells

[Xatu Cans]

Hi, I'm trying to delete the <p> tag  inside tables
cell. I've wrote this code in the TS setup of my page:

lib.parseFunc_RTE.externalBlocks.table.HTMLtableCells.default >
lib.parseFunc_RTE.externalBlocks.table.HTMLtableCells.default.stdWrap.parseFunc
=< lib.parseFunc

it works perfectly, but when I insert a table with RTEhtml inside tt_news 
item,
the <p> reappears. How can I delete it?