Journalists in tea-shop occasionally drink (8)
I believe the answer is:
espresso
'drink' is the definition.
(espresso is a kind of drink)
'journalists in tea-shop occasionally' is the wordplay.
'journalists' becomes 'press' (I've seen this before**).
'in' is an insertion indicator.
'occasionally' means one should take alternating letters.
'tea'+'shop'='teashop'
The alternate letters of 'teashop' are 'eso'.
'press' placed into 'eso' is 'ESPRESSO'.
(Other definitions for espresso that I've seen before include "strong drink" , "This may keep someone awake!" , "Coffee made under steam pressure" , "Italian strong coffee traditionally in a little cup" , "Kind of shot" .)