You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
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Question: Category: "T.W." 
Clue: You might have learned to ride your bike with the help of these attachments

Answer: training wheels


Question: Category: BETTER KNOWN AS.... 
Clue: Singer Helen Folasade Adu

Answer: sade


Question: Category: COMMUNICATION 
Clue: The 2-way field radio developed by Don Hings for bush pilots in 1937 soon got this snappier name

Answer:
walkie-talkies