Following pressure, decree different lead (7)
I believe the answer is:
precede
'lead' is the definition.
(I know that lead can be written as precede)
'following pressure decree different' is the wordplay.
'following' says to put letters next to each other.
'pressure' becomes 'p' (abbreviation).
'different' indicates an anagram.
'decree' with letters rearranged gives 'recede'.
'p' next to 'recede' is 'PRECEDE'.
(Other definitions for precede that I've seen before include "Take the lead" , "go before the others" , "Go before (someone)" , "Go in front" , "Antedate" .)