3d. [campanologist] produces this water pipe. (4)
BONG (double meaning, sound produced by a campanologist (bell ringer) and a water pipe). Confirming for us that DA wasn’t always as clean cut as he seems on the TV!!!
10a. Slash [campanologist] action (6) TINKLE
TINKLE (double meaning, slang to urinate and an action a campanologist might take). OK, so I like toilet humour.