Join in urgent message to expose pathetic people (6)
I believe the answer is:
saddos
'pathetic people' is the definition.
(I've seen this before)
'join in urgent message' is the wordplay.
'join' becomes 'add'.
'in' indicates putting letters inside.
'urgent message' becomes 'sos'.
'add' going within 'sos' is 'SADDOS'.
'to expose' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for saddos that I've seen before include "dull and boring people" , "Pathetic people" .)