Completely stuck with bottom left corner.
16ac Reportedly pointless blade (4) **n*
20 a/c Diamonds perhaps with justification in item of luggage (8) **i***s*
24a/c Raised band led by sailor in trim (7) **r***e
16d View across middle of grounds with lake and river(7) ****u**
19d Fearful bother between son and daughter (6)
***r**