Emphasised that one was under pressure (8)
I believe the answer is:
stressed
This might be a double definition.
'emphasised that one' is the first definition.
'stressed' can be an answer for 'emphasised' (I've seen this before). I'm unsure of the remainder of the definition.
'under pressure' is the second definition.
(I've seen this before)
'was' is the link.
Can you help me to learn more?
(Other definitions for stressed that I've seen before include "Insisted" , "Emphasized or attached importance to" , "overwrought" , "Pressurised, strained" , "under force" .)