Here, gibe not good after black mark given to head (5)
I believe the answer is:
bindi
'black mark given to head' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'here gibe not good' is the wordplay.
'here' becomes 'bin' (I can't justify this - if you can you should believe this answer much more).
'gibe' becomes 'dig' (synonyms).
'not' is a deletion indicator.
'good' becomes 'g' (abbreviation).
'dig' with 'g' taken away is 'di'.
'bin'+'di'='BINDI'
'after' is the link.
Can you help me to learn more?
(Other definitions for bindi that I've seen before include "Red dot worn on the forehead by Hindu women" , "spot on forehead" , "Hindu forehead mark" .)