
1) Oscine 2) Oscine bird
Found on
https://www.crosswordclues.com/clue/accentor

The accentors are in the only bird family, Prunellidae, which is endemic to the Palearctic. This small group of closely related passerines are all in a single genus Prunella. All but the dunnock and the Japanese accentor are inhabitants of the mountainous regions of Europe and Asia; these two also occur in lowland areas, as does the Siberian accen...
Found on
http://en.wikipedia.org/wiki/Accentor

songbird
Found on
http://phrontistery.info/a.html

• (n.) One who sings the leading part; the director or leader. • (n.) A genus of European birds (so named from their sweet notes), including the hedge warbler. In America sometimes applied to the water thrushes.
Found on
http://thinkexist.com/dictionary/meaning/accentor/

any of the 12 species of the bird genus Prunella, constituting the Old World family Prunellidae (order Passeriformes). They have thrushlike bills ...
Found on
http://www.britannica.com/eb/a-z/a/10
Ac·cen'tor noun [ Latin
ad . +
cantor singer,
canere to sing.]
1. (Mus.) One who sings the leading part; the director or leader. [ Obsolete]
2. (Zoology) A genus of European birds (so named from their sweet notes), including the hedge warbler. In Amer...
Found on
http://www.encyclo.co.uk/webster/A/13

An accentor is a type of bird of the prunelliadae family.
Found on
http://www.probertencyclopaedia.com/browse/BA.HTM

[
n] - small sparrow-like songbird of mountainous regions of Eurasia
Found on
http://www.webdictionary.co.uk/definition.php?query=accentor
noun small sparrow-like songbird of mountainous regions of Eurasia
Found on
https://www.encyclo.co.uk/local/20974

any oscine bird of the family Prunellidae, of Europe and Asia, resembling sparrows but having more finely pointed bills, as the hedge sparrow.
Found on
https://www.infoplease.com/dictionary/accentor
No exact match found.