Slowly utter line at end of sketch (5)
I believe the answer is:
drawl
'slowly utter' is the definition.
I can't judge whether this definition defines the answer.
'line at end of sketch' is the wordplay.
'line' becomes 'l' (used when specifying particular lines from a poem).
'at end of' says to put letters next to each other (some letters go at the end of others).
'sketch' becomes 'draw' (to sketch is to draw).
'l' put after 'draw' is 'DRAWL'.
Can you help me to learn more?
(Other definitions for drawl that I've seen before include "Speak slowly and protractedly" , "Way of speaking slowly" , "manner of speaking" , "Speak with lengthy vowel sounds" , "Accent with slow and lazy delivery" .)