English journalists tucking into extremely strong drink (8)
I believe the answer is:
espresso
'strong drink' is the definition.
(type of coffee drink)
'english journalists tucking into extremely' is the wordplay.
'english' becomes 'E' (abbreviation).
'journalists' becomes 'press' (the press can mean the newspaper industry).
'tucking into' means one lot of letters goes inside another.
'extremely' becomes 'so' ('so' can mean 'extremely' or 'very').
'press' going within 'so' is 'spresso'.
'e'+'spresso'='ESPRESSO'
(Other definitions for espresso that I've seen before include "Italian strong coffee traditionally in a little cup" , "Coffee-making machine" , "Coffee (S, not X)" , "Barista's beverage" , "Italian-style coffee" .)