15a) Spot last of old fruit (6) D?P???
16d) Birds almost clean flower (8) ????S?U?
19a) Her steals implement over here in centre (6) ?O?T??
23d) Spots rare tree (4) R?S?
25d) New U.S. president's victory (4) N?K? - is it Nike?
Is 18 down Sphere?
Thanks in advance for your help.