hootenanny, yes some people used to call travis style clawhammer
Travis Picking" is a syncopated style of guitar fingerpicking rooted in ragtime music in which alternating chords and bass notes are plucked by the thumb while melodies are simultaneously plucked by the index finger
Donovan does not play like that, he plays thumb melody which is generally known as carter style. he wrongly calls it clawhammer https://www.youtube.com/watch?v=Q3tWkyYXcLc it does not sounds if peggy was his teacher from this interview