There are three words in each set: two with hints, and one undefined. All three words are in alphabetical order. Solve the clues to get the two outer words, and find the word in the middle.
Use singular form of words unless specified, and the most prominent answers
e.g. In the middle = Neutral / Opposite of 'old' = New .... Neutral, NEVER, New
I like this idea, but you need to be more specific about the middle word. Many words- often common words- would fit into most of the clues (e.g., Bet is between beside and beta).