Crook hiding in safe London house (5)

I believe the answer is:

felon

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

'crook hiding' is the definition.
'felon' can be an answer for 'crook' (I've seen this in another clue). I am not sure about the 'hiding' bit.

'in safe london house' is the wordplay.
'house' indicates a hidden word (I've seen 'houses' mean this (part of the clue houses the answer)).
'FELON' is hidden within 'in safe london'.

Can you help me to learn more?

(Other definitions for felon that I've seen before include "Mighty" , "sore" , "Malefactor" , "Convicted criminal" , "Serious criminal" .)

I've seen this clue in The Globe and Mail.

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.