I don't know 5a (4) 'Day'. I've got -e-k and can't see beyond 'week' although don't know why.
Also, is 18a (6) 'League'? Clue is compact ranking list.
Finally, 15d (8) 'Tooth collector' I've got 'gatherer' but am really only sure of ---h-r-r
Grateful for any help.