Investigation puts pressure on awful bore (5)
I believe the answer is:
Here is my best explanation:
'investigation' is the definition.
(probe is a kind of investigation)
'pressure on awful bore' is the subsidiary indication.
'pressure' becomes 'p' (abbreviation).
'on' says to put letters next to each other.
'awful' indicates an anagram.
'bore' is an anagram of 'robe'.
'puts' is the link.
(Other definitions for probe that I've seen before include "Poke into", "Inquiry", "sound", "Explore, examine", "Examine searchingly", "Investigation", "Closely enquire into", "Question or examine closely", "Question or examine thoroughly" and "(Crime) investigation".)