Meticulous yet containing nothing right (8)
I believe the answer is:
thorough
'meticulous' is the definition.
(I've seen this before)
'yet containing nothing right' is the wordplay.
'yet' becomes 'though' (I've seen this in another clue).
'containing' is an insertion indicator.
'nothing' becomes 'O' (looks like zero - 0).
'right' becomes 'r' (abbreviation).
'o'+'r'='or'
'though' placed around 'or' is 'THOROUGH'.
(Other definitions for thorough that I've seen before include "Painstaking; absolute" , "Complete; utter" , "Full" , "Scrupulous in completing work" , "Total - painstaking - in-depth" .)