Cryptic 2465

[bald eagle]

help required with last 2 clues, please

20d idea is to have the other cut by half, 6 letter word
believe answer is theory?

27a turn on the little jerk, 5 letter word, believe answer is start?

Would appreciate confirmation whether my answers are correct, or any other possible suggestions, please

thank you

[kayakamina]

The or y.....the other =or

Start ....turn on & jump/nervy/jerk

[BigDave44]

kayakamina I hate to disagree with such an eminence as yourself, but the wordplay for theory is:

theor (other, cut - ie anagram) + (b)y (half of by)

[bald eagle]

many thanks to you both for your prompt responses are reasoning for the answers- very much appreciated

[kayakamina]

Thank you Big Dave I didn't read the clue properly.

Six of the best for me !

Regards K