Publicity individual received makes them susceptible (5)
I believe the answer is:
prone
'susceptible' is the definition.
(I've seen this in another clue)
'publicity individual' is the wordplay.
'publicity' becomes 'PR' (public relations).
'individual' becomes 'one' (an individual is one person).
'pr'+'one'='PRONE'
'received makes them' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for prone that I've seen before include "Liable (to suffer) - lying down" , "Placed face down" , "Recumbent, likely" , "Lying flat" , "Lying face downward" .)