I really am struggling this week and I haven't even looked at Sunday's cryptic.
6 dArchetypal low brow female from harlow (5 4) 16d Hoses out a mucky building (4 5) 18d Behold in different places shellfish (8) 20a trifling snub (6) 23a Genuine period on the computer (8) 25a Ferryman should get first clue (3 6)