Unexpectedly godly line in vocalisation? (9)
I believe the answer is:
yodelling
'vocalisation?' is the definition.
'unexpectedly godly line' is the wordplay.
'unexpectedly' is an anagram indicator.
'godly'+'line'='godlyline'
'godlyline' with letters rearranged gives 'YODELLING'.
'in' is the link.
(Other definitions for yodelling that I've seen before include "making offpeak call" , "singing style" .)