33d 4 letter word for row or rank with the usual m for minutes inside....then you need to "change it " in a similar way to what you did to 31d (always remembering the clue number is a hint)
14a normal ...5 letter word for with no clothes on ...minus the d ...add an R to get the drum
1d normal answer is adm (admiral) + ix ... then you need to change it similarly for entry ...
20d and 6d change into each other if you use the same method...