Conclusion’s clear after both openers are gone: draw (6)
I believe the answer is:
endear
'draw' is the definition.
(I've seen this before)
'conclusion's clear after both openers are gone' is the wordplay.
I cannot really see how this works, but
an anagram of 'are' is 'ear' which is within the answer.
'conclusion' could be 'end' (end is a kind of conclusion) and 'end' is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for endear that I've seen before include "Win over" , "Delight - please" , "Earned (anag.)" , "Neared so as to make loved" , "Make popular" .)