I have focused as advised on reducing clashes wherever possible. This wielding of Iona's Razor has led me to a revelation in that part of the puzzle but I am still stuck and I too still have unsolved answers.
In the spirit of relieving misery wherever we find it I am happy to bend the rules as follows:
14W - two-word def, then the answer is staring you in the face, as long as you know your nutritional science
22W - one-word def followed by 'put away' in an example of Nazi geography
25 - the key here is 'elected' + 'before'.
I have nothing for 18W either and would be glad of help with that and 21N.