
1) Poetic rhythm 2) Welsh poetry
Found on
https://www.crosswordclues.com/clue/cynghanedd

In Welsh language poetry, cynghanedd (kəŋ̊ˈhaneð, literally `harmony`) is the basic concept of sound-arrangement within one line, using stress, alliteration and rhyme. The various forms of cynghanedd show up in the definitions of all formal Welsh verse forms, such as the awdl and cerdd dafod. Though of ancient origin, cynghanedd and variati.....
Found on
http://en.wikipedia.org/wiki/Cynghanedd

Welsh poetic device. It is a complicated system of alliteration and internal rhyme, obligatory in the 24 strict metres of Welsh bardic verse. ... [3 related articles]
Found on
http://www.britannica.com/eb/a-z/c/175

(pronounced kun HAN neth, lit. Welsh for 'symphony') A Welsh term that loosely denotes sound similar
Found on
http://www.encyclo.co.uk/local/22385

(pronounced kun-ghah-nedh) Intricate Welsh system of alliteration and rhyme. It is impossible to replicate in English but the following line from Hopkins's The Wreck of the Deutschland gives an approximation: 'The down-dugged ground-hugged grey'.
See Welsh forms.
Found on
http://www.poetsgraves.co.uk/glossary_of_poetic_terms.htm
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