Pa's neurotic about preliminary safety procedures (11)
I believe the answer is:
precautions
'preliminary safety procedures' is the definition.
'pa's neurotic about' is the wordplay.
'about' is an anagram indicator.
'pas'+'neurotic'='pasneurotic'
'pasneurotic' is an anagram of 'PRECAUTIONS'.
(Other definitions for precautions that I've seen before include "Measures taken in advance to minimise risks" , "Preventative measures" , "Safeguards" .)