Gritty Greek circular lacking a name (8)
I believe the answer is:
granular
'gritty greek circular lacking a name' is the definition.
I can't tell whether this definition defines the answer.
'gritty greek circular lacking a name' is the wordplay.
'gritty greek' becomes 'gr' (I am not sure about the 'gritty' bit.).
'circular' becomes 'annular' (synonyms).
'lacking' is a deletion indicator.
'a name' becomes 'n' (common abbreviation e.g. on forms).
'annular' with 'n' taken out is 'anular'.
'gr'+'anular'='GRANULAR'
(Other definitions for granular that I've seen before include "Particulate" , "Gritty (like some sugar?)" , "Like grains or hard particles" , "Consisting of small hard particles" , "Made of small particles" .)