Looked at watch, not posh, found in grass (8)
I believe the answer is:
regarded
'looked at' is the definition.
(regarding is a kind of looking at)
'found in grass' is the wordplay.
'found' becomes 'gard' (I am not sure about this - if you are sure you should believe this answer much more).
'in' means one lot of letters goes inside another.
'grass' becomes 'reed' (type of grass plant).
'gard' inserted inside 'reed' is 'REGARDED'.
'watch not posh' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for regarded that I've seen before include "Looked at and esteemed" , "Considered or deemed to be" , "Watched" .)