Descriptive words no good for teeth pig's lost (8)
I believe the answer is:
epithets
'descriptive words' is the definition.
'no good for teeth pig's lost' is the wordplay.
'no' suggests deleting specific letters.
'good for' becomes 'g' (I've seen this in other clues).
'lost' indicates an anagram.
'teeth'+'pigs'='teethpigs'
'teethpigs' with 'g' taken out is 'teethpis'.
'teethpis' is an anagram of 'EPITHETS'.
(Other definitions for epithets that I've seen before include "Words that describe" , "Adjectives or adjectival phrases" , "Descriptive words or phrases" .)