Be slow to speak (5)
I believe the answer is:
drawl
'speak' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for drawl that I've seen before include "Accent with slow and lazy delivery" , "Speak slowly with long vowels sounds" , "Speak slowly and lazily" , "Slow, protracted way of speaking" , "Speak slowly and protractedly" .)