Assistant who helps people operate their phones and secretly records their conversations (allegedly)
9A
First floor apartment number, possibly (more likely, a word that only exists in wordlists to help crossword compilers who've set themselves into a corner)
11A
Mythological creature associated with, say, fire or air (to give two examples)
13A
Found on grass after a damp night, or in a soda can
14A
Jacket often worn by James Bond villains
15A
Delete
17A
"Any sufficiently advanced technology is indistinguishable from ___" - Arthur C. Clarke
19A
Famous revolutionary
22A
The Flying Dutchman, for example
24A
Bird or chess piece
25A
Yearn
26A
Sets of 3 ft
27A
You might up this if you're in a gambling mood
Verticales
1D
Previously owned
2D
Tessellate
3D
"You're not mad at me, right?"
4D
Powerpuff Girls villain who, in retrospect, was deeply problematic
5D
Found in the human eyeball alongside rods
6D
Where you might take some bad news
7D
Expensive
10D
Opponents of RED in Team Fortress 2
12D
Pass into law
16D
Gambles
17D
Workplace supervisor (acronym)
18D
Hello, sailor!
20D
Little bit (of a flavour or an ingredient)
21D
Crossword setter's favourite type of fencing sword