Saved by, you think, by the grass surround (8)
I believe the answer is:
redeemed
'saved by you' is the definition.
'redeemed' can be an answer for 'saved' ('redeem' can be a synonym of 'save'). I am not sure about the 'by you' bit.
'think by the grass surround' is the wordplay.
'think by' becomes 'deem' (I've seen this in another clue. I am not sure about the 'by' bit.).
'the grass' becomes 'reed' (I've seen this before).
'surround' is an insertion indicator.
'deem' placed into 'reed' is 'REDEEMED'.
Can you help me to learn more?
(Other definitions for redeemed that I've seen before include "Bought out of pawn" , "exchanged tokens" , "bought back from uncle?" , "Thought about the possibilities again" , "Bought back from pawnbroker" .)