Coffee reps blasted oil company (8)

I believe the answer is:

espresso

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

'coffee' is the definition.
(espresso is a kind of coffee)

'reps blasted oil company' is the wordplay.
'blasted' indicates anagramming the letters.
'oil company' becomes 'esso' (I can't justify this - if you can you should believe this answer much more).
'reps' anagrammed gives 'espr'.
'espr'+'esso'='ESPRESSO'

Can you help me to learn more?

(Other definitions for espresso that I've seen before include "Coffee made under steam pressure" , "Drinks machine" , "This may keep someone awake!" , "Type of coffee" , "Kind of coffee made with steam" .)

I've seen this clue in The Sun.

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.