Padre worried about a procession (6)
I believe the answer is:
parade
'procession' is the definition.
(I know that parade is a type of procession)
'padre worried about a' is the wordplay.
'worried' is an anagram indicator (worry can mean to interfere with or disturb).
'about' means one lot of letters goes inside another.
'padre' anagrammed gives 'parde'.
'parde' placed around 'a' is 'PARADE'.
(Other definitions for parade that I've seen before include "'Procession of bands, floats, etc (6)'" , "Air - display" , "Exhibit" , "March past" , "Public walk or march" .)