Customary dress you finally presented to almost everybody (8)
I believe the answer is:
habitual
'customary' is the definition.
(synonyms)
'dress you finally presented to almost everybody' is the wordplay.
'dress' becomes 'habit' (habiting is a kind of dressing).
'finally' suggests the final letters.
'presented to' means one lot of letters go next to another.
'almost' means to remove the last letter (most of the word but not all of it).
'everybody' becomes 'all' (I've seen this before).
The final letter of 'you' is 'u'.
'all' with its last letter taken off is 'al'.
'habit'+'u'+'al'='HABITUAL'
(Other definitions for habitual that I've seen before include "Regular, usual" , "set" , "A halibut? (anag)" , "Done constantly or regularly (8)" , "Customary, regular" .)