Potentially, online agent’s spot (4)

I believe the answer is:

espy

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

'spot' is the definition.
(I know that spot can be written as espy)

'potentially online agent's' is the wordplay.
'potentially online' becomes 'e' (as in e-mail or e-commerce. I am not sure about the 'potentially' bit.).
'agent' becomes 'spy' (spy is a kind of agent).
'e'+'spy'='ESPY'

Can you help me to learn more?

(Other definitions for espy that I've seen before include "Pick out at a distance" , "Watch" , "Catch sight of (poetic)" , "Discern" , "Spot; observe" .)

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.