Search in grass as asked (9)
I believe the answer is:
Here is my best explanation:
'asked' is the definition.
('request' can be a synonym of 'ask')
'search in grass' is the subsidiary indication.
'search' becomes 'quest' (quest is a kind of search**).
'in' is an insertion indicator.
'grass' becomes 'reed' (I've seen this in other clues).
'quest' going within 'reed' is 'requested'.
'as' is the link.
(Another definition for requested that I've seen is "Asked for".)