Quite easy, I found, solving time 13 mins.
* = anagram
ACROSS
5 STAIRCASE (car seat is)*
7 FINE R Sharpness of pencils
9 S (P) INNER Not a doctor in the medical sense
10 DUNK IRK
11 R (EP) AY
12 ALL BLACKS NZ Rugby team
14 JUST I F (I)ABLE
19 CARB(on) UNCLE
21 NA (TT)Y
22 AN (TEN) NA
23 WI CHIT A
25 L OVER
26 GIN PALACE (Celia pang)*
DOWN
1 MA XI A large yacht
2 FR (ENZ) Y (zen)*
3 NEW DELHI (wine held)*
4 INDISCREET (hide in secret)* less he
5 SIS ERA From the Bible
6 A (s)ORT A
7 FAN CLUB
8 RA KISH More from the Bible
12 PEJORATIVE (to jeer a VIP)*
15 S (T) UNNER (n-nurse)*
16 IN CHARGE
17 S CRAWL
18 G (YR) ATE
20 EDWIN Hidden
21 NEC TAR
24 I (RA) Q