Determined to be delivered end first (8)
I believe the answer is:
stubborn
'determined' is the definition.
(I've seen this before)
'delivered end first' is the wordplay.
'delivered' becomes 'born'.
'end' becomes 'stub' (I've seen this before).
'first' says to put letters next to each other.
'born' after 'stub' is 'STUBBORN'.
'to be' acts as a link.
(Other definitions for stubborn that I've seen before include "Rigid" , "Unreasonably unwilling to change" , "refractory" , "Obdurate and unyielding (8)" , "Tenaciously unwilling to give in" .)