Spread out breads after cover is removed (6)
I believe the answer is:
unroll
'spread out' is the definition.
I cannot understand how the rest of the clue works.
(Other definitions for unroll that I've seen before include "Reverse winding or twisting" , "Dismantle the joint, perhaps" , "Gradually reveal" , "Unfurl" , "Open out (eg, scroll)" .)