DHL disheartened about unskilled kind of delivery (5)
I believe the answer is:
drawl
'kind of delivery' is the definition.
(I know that drawl is a type of delivery)
'dhl disheartened about unskilled' is the wordplay.
'disheartened' suggests removing the centre (the middle or heart is removed).
'about' means one lot of letters goes inside another.
'unskilled' becomes 'raw' (I am not sure about this - if you are sure you should believe this answer much more).
'dhl' with its centre taken out is 'dl'.
'dl' going around 'raw' is 'DRAWL'.
Can you help me to learn more?
(Other definitions for drawl that I've seen before include "manner of speaking" , "Speak slowly and lazily" , "Speak with lengthy vowel sounds" , "Prolong vowel sounds" , "Slow, protracted way of speaking" .)