A despicable man about to pocket one bit of bling? (5)
I believe the answer is:
tiara
'bling?' is the definition.
'a despicable man about to pocket one bit' is the wordplay.
'a despicable man' becomes 'tar' (I have seen 'Naval man' mean 'tar' so perhaps 'man' could also mean 'tar'. I am not sure about the 'despicable' bit.).
'about' becomes 'a' (abbreviation in Chambers).
'to pocket' means one lot of letters goes inside another.
'one bit' becomes 'i' (resembles t, a binary digit or bit).
'tar'+'a'='tara'
'tara' enclosing 'i' is 'TIARA'.
'of' is the link.
Can you help me to learn more?
(Other definitions for tiara that I've seen before include "Crescent-shaped headdrsss or Pope's diadem" , "Jewelled head wear" , "Small crown" , "Type of diadem" , "Woman's head ornament" .)