Last couple, any ideas?
20d) Cut grass and remove weeds, say - I'm tired (5-2) H _ I _ H - _ O
29d) Lass crossing canal in this town (7) S _ L _ O _ D
Can't grasp the word play for this one either
35d) Forensic equipment that is spread about, held up by reader (3,8)
L _ E,_ E _ E _ T _ R.
This can only be "Lie detector", but can only see the IE = that is