Genius

[yellow11]

down clues have extra word.across entries may be deduced from clue combined with one of extra down words-help please!and parsing
4a cunning trick with edges of special cube 6 rubiks?
10a hi-tech utensil contains means of waste disposal 5 S?O?T shoot sounds like chute!
11a go round bend,taking issue with occupier of bed 9could start c-carnation???????????
17a doctor behind selection of people7 possibly D???G??
thanks

[ProfessorMaisie]

4a edges of SpeciaL + EIGHT = 'cube' (maths) sounds like... [the entry].
10a inside 'hi teCH UTEnsil' sounds like...
11a 'go round the bend' = CORNER with 'issue' = FLOW inside - sounds like...
17a usual DR for 'doctor' + 'behind' = AFT - sounds like...

[lashley]

many thanks