Answer:

avi

AnswerCrossword Clue
AVI"Nothing But The Truth" writer
AVI.mov alternative
AVIFile format alternative to .mov
AVIBird (comb. form)
AVIBird (prefix)
AVIPrefix for the birds
AVIBirdy comb. form
AVIRelative of an mp4
AVIMononymous children's author who wrote "The True Confessions of Charlotte Doyle"
AVIBird: Prefix
AVIPrefix with fauna
AVICulture opening
AVIFeathered friend's prefix
AVIPrefix with culture
AVI"Crispin: The Cross of Lead" Newbery Medal-winning author
AVIBeginning for the birds?
AVIBird-related prefix
AVIBirdy prefix
AVIFauna forerunner
AVI.mpeg alternative
AVINewbery winner for "Crispin: The Cross of Lead"
AVIFlying start?
AVIBird:Comb. form
AVIBird: Comb. form
AVIBird leader?
AVIBird: Pref.
AVIWord form for "bird"
AVI"Bird" word form
AVIFlying start
AVIIt means "bird"
AVIMultimedia file format
AVIPrefix with culture or fauna
AVIFlight: Prefix.
AVIBird: Comb. form.
AVI... culture (rearing of birds).
AVIOf a grandfather: Lat.
AVIPrefix in bird words.
AVIGrandfathers: Lat.
AVIOf birds: Lat.
AVIPrefix in bird terms.