Meticulous (10)
There are a few possibilities for this:
'meticulous' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for fastidious that I've seen before include "Meticulous" , "Attentive to detail" .)
'meticulous' is the definition.
(synonyms)
This is all the clue.
(Other definitions for scrupulous that I've seen before include "Conscientious, exact" , "Conscientious, careful" , "Moral" , "Principled" , "Very ethical" .)
(Other definitions for thorough that I've seen before include "'Exhaustive, complete (8)'" , "Sweeping" , "Meticulous and conscientious" , "Detailed" , "Doing things with great attention to detail" .)
'meticulous' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for diligent that I've seen before include "Conscientious and careful" , "Painstaking - I tingled (anag)" , "Industrious" , "Thorough" , "Showing care and effort" .)
'meticulous' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for precise that I've seen before include "with accuracy" , "Exact like recipes" , "Recipes (anag.)" , "Specific" , "'Exact, accurate (7)'" .)