Steadily working at fabricating under pressure (6)
I believe the answer is:
plying
'pressure' is the definition.
(thesaurus)
'steadily working at fabricating under' is the wordplay.
'steadily working at' becomes 'p' (I can't explain this - if you can you should give a lot more credence to this answer).
'fabricating' becomes 'lying' (I've seen this in another clue).
'under' is a charade indicator (letters next to each other).
'p'+'lying'='PLYING'
Can you help me to learn more?
(Other definitions for plying that I've seen before include "carrying on" , "Travelling a route regularly" .)