Mon D Mail No. 14,672

[bryand]

4d) A lesson lacking any ethical principles (6) A???I?
9a) County backed best American swimmer (7) ??T?P??
10d) Night light for Hollywood cameraman's job (10) no letters
13d) Georgian students work to draw up opinion survey (6,4)
25a) Ad hoc components do without rotating strap (5,5) no letters.
All help greatly appreciated

[michaelmph]

amoral
octopus
shooting star
gallop poll
spare parts

[retrocop]

amoral
octopus
shooting star
gallop poll
spare parts

[Sipowicz]

GallUp poll!

[Sipowicz]

http://en.wikipedia.org/wiki/Gallup_(company)

[bryand]

Thank you michaelmph, retrocop and Sipowicz for your helpful answers.
Sorry about 'best answer', this is an honourable draw between michaelmph and retrocop, but I pressed the wrong key and cannot alter my mistake.