Taps into data and nicks stuff (7)

I believe the answer is:

filches

I'm a little stuck... Click here to teach me more about this clue!

'nicks stuff' is the definition.
Although both the answer and definition are verbs in their -s form, I don't see how they can define each other.

'taps into data' is the wordplay.
'taps' becomes 'C H' (I've seen this in other clues).
'into' is an insertion indicator.
'data' becomes 'files' (I can't justify this - if you can you should give a lot more credence to this answer).
'ch' put within 'files' is 'FILCHES'.

'and' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.