Radio Times 36

[skyblue4ever]

A couple that I think I have right but not sure why so any explanations appreciated.
1d Nearly recognise large lake bellow hillock(5) *N*L* Think it's KNOLL but can't see link to lake.
4d Moved smoothly, being well built but not old (4) *L*D Is it SLID.
23a Anchor now left out of grasp (5) *E*G* Think this is KEDGE but can't see link to out of grasp.
Many thank in advance.

[Lie-in King]

1d Knoll - 'kno(w)' (nearly 'recognise') + 'l(arge) l(ake)'
4d S(o)lid - 'well-built', not 'o(ld)'
23a Kedge - 'now l(eft)' out of 'knowledge' (grasp)

[dannyk13]

Kno(w) +l(large) + l(lake)
S(o)lid
K(now l)edge

[vakayu]

1d kno(w)+ll=large lake

[skyblue4ever]

Thanks to you all. Now they make sense