There is a superfluous letter in each clue which needs to be ignored to reach the solution
Saw losers in favour of something that means action (4)
Is the answer a synonym of the first word?
Which word contains superfluous letter (that or means) ? Can't understand this
Ruling state sent back English money in small change (9)
Paper out to launch dishonesty being relevant once more?(10)
Is the answer Reapplying
To remove a from launch?
Taxing backers of problem states is more sophisticated (6)
Is the T to be removed from first word? Can't find the solution though
1 You need to remove a letter from ‘losers’ leaving another word. ‘Something that means action’ is the definition.
3. Yes, the answer is an anagram of ‘Paper’ plus ‘lying’.
4. Yes, remove the last letter from a 3 letter word meaning a maths problem and remove the last letter from the 3rd person singular of a word meaning ‘says’ or ‘affirms’. ‘More sophisticated’ is the definition.
2 You need to remove a letter from ‘ruling’. This plus ‘state’ then forms the definition part. For the wordplay, put a 5-letter word for small change or coppers round E(nglish) and a 3-letter slang word for money spelt backwards.