Handle boron OK in new format after doubts initially (8)
I believe the answer is:
doorknob
'handle' is the definition.
(handle on a door)
'boron ok in new format after doubts initially' is the wordplay.
'in new format' is an anagram indicator.
'after' says to put letters next to each other.
'initially' suggests taking the first letters.
The initial letter of 'doubts' is 'd'.
'boron'+'ok'='boronok'
'boronok' with letters rearranged gives 'oorknob'.
'oorknob' after 'd' is 'DOORKNOB'.
(Other definitions for doorknob that I've seen before include "Handle for entry" , "Turn it to gain entry" , "Latch opener" , "It may be turned to gain entrance" , "Opening handle" .)