Put it in about formal procedure? (4)
I believe the answer is:
rite
'formal procedure?' is the definition.
(I've seen this in another clue)
'put it in about' is the wordplay.
'put' means one lot of letters goes inside another.
'in about' becomes 're' ('re' means regarding or about. I am not sure about the 'in' bit.).
'it' placed inside 're' is 'RITE'.
(Other definitions for rite that I've seen before include "Customary observance" , "Ceremonial procedure" , "Ceremony - ritual" , "Custom" , "Formal procedure" .)