After pressure get to give sermon (6)
I believe the answer is:
preach
'give sermon' is the definition.
(I've seen this before)
'after pressure get' is the wordplay.
'after' says to put letters next to each other.
'pressure' becomes 'p' (abbreviation).
'get' becomes 'reach' (reaching is a kind of getting).
'p' put next to 'reach' is 'PREACH'.
'to' is the link.
(Other definitions for preach that I've seen before include "Sermonise" , "''Practise what you . . . . . . ''" , "Take a perch to deliver sermon" , "Lecture" , "A perch (anag.)" .)