Keen on Geordie chant? (6)
I believe the answer is:
intone
'chant?' is the definition.
(I know that chant can be written as intone)
'keen on geordie' is the wordplay.
'keen on' becomes 'into' (if you're 'into' something you're keen on it).
'geordie' becomes 'NE' (Geordies are from Tyneside in the North East).
'into'+'ne'='INTONE'
(Other definitions for intone that I've seen before include "Recite without inflection" , "Speak in chant or drone" , "Speak in chanting voice" , "Recite as a chant" , "Recite with little variation in pitch" .)