Looking very clean, if you're not quite so hawk-eyed (8)
I believe the answer is:
spotless
'looking very clean' is the definition.
'spotless' can be an answer for 'clean' (I've seen this in another clue). I am not sure about the 'looking very' bit.
'you're not quite so hawk-eyed' is the wordplay.
I cannot really see how this works, but
'not' could be 'less' (I've seen this in other clues) and 'less' is found within the answer.
The remaining letters 'spot' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'if' acts as a link.
Can you help me to learn more?
(Other definitions for spotless that I've seen before include "Immaculate" , "Without blemish" , "Spic-and-span" , "Irreproachably clean" , "Immaculately clean" .)