9a) Get tissue sample by going round current operations (6) ?I?P?Y -Biopsy
13a) Protect last of fine lowland in suburbs of Dartford (6) D???N?
14d) Alteration in Scottish river creates bubbles (5)
17a) Secluded spot in a large inlet (6) ?L???e
23a) Expression that is found in Minnesota (4) M?E?
All help greatly appreciated