Correct spelling for the English word "hagger" is [hˈaɡə], [hˈaɡə], [h_ˈa_ɡ_ə] (IPA phonetic alphabet).
In Scot., a person employed in felling timber : hag a quagmire, as a moss-hag.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.