Observer Everyman Please Explain

[Gavmacp]

Well for the first time I completed this before going to bed.
Please explain the following..
12a For this one needs right type of oven (5) Answer (I think) Roast
16a Certainly at home, everyone's against discipline at school (2,3,10) Answer In all conscience
2d Steps taken to control a star (5,4) Answer Bossa nova
4d Scary place sought, to include a hospital by river? (7,5) Answer Haunted house (I get most of this but not all of it)
15d Without equal, nothing contains cricket side on level above English (9) Answer Nonpareil
17d Omitted the French female solicitor (4,3) Answer left out
Thank you in advance

[glasman]

Right-R
type of oven-oast

[scorpiojo]

12 r(ight) oast (oven)
2 boss (control) a nova (star)
16 in (at home) all (everyone) con (against) science (a discipline)

[glasman]

at home,- in
everyone's- all
against -con
discipline at school - science

[scorpiojo]

17 Le (the) f(emale) tout (solicitor)

[scorpiojo]

Hunted - sought
H(ospital)
Ouse - river

[scorpiojo]

^ + a

[Baldric]

17, Le (f) tout
tout = solicit

[glasman]

H(a)unted
H- hospital
Ouse -river

[Lie-in King]

Roast - 'r(ight)' + 'oast' (oven)
In all conscience - 'in' (at home) + 'all' (everyone) + 'con' (against) + 'science'
Boss-a nova - a dance, so "steps taken"
Haunted house - 'a' (in) 'hunted' (sought) + 'h(ospital)' + 'Ouse' (river)
Nonpareil - 'nil' (nothing, contains) 'on' (cricket side) + 'par' (level) + 'E(nglish)'
Left out - 'le' (Fr. "the") + 'f(emale)' + 'tout' (solicitor)

[Gavmacp]

Thank you all!