Lout loves dried grass on the counter (5)
I believe the answer is:
yahoo
'lout' is the definition.
(I've seen this before)
'loves dried grass on the counter' is the wordplay.
'loves' becomes 'oo' (two O's - 'love' means zero in tennis).
'dried grass' becomes 'hay' (I've seen this before).
'on the counter' says the letters should be written in reverse (counter can mean in the opposite direction).
'oo'+'hay'='oohay'
'oohay' back-to-front is 'YAHOO'.
(Other definitions for yahoo that I've seen before include "Rude or brutish person" , "Swift chap" , "One of Dean Swift's brute people" , "Human-looking beast in Gulliver's Travels: search engine conglomerate" , "Gulliver's animal in human form" .)