Row about a rug with energy (5)
I believe the answer is:
argue
'row' is the definition.
(I've seen this before)
'about a rug with energy' is the wordplay.
'about' indicates an anagram.
'with' says to put letters next to each other.
'energy' becomes 'e' (physics symbol as in E=mc2).
'a'+'rug'='arug'
'arug' is an anagram of 'argu'.
'argu'+'e'='ARGUE'
(Other definitions for argue that I've seen before include "Debate, row" , "express disagreement" , "Debate, contest verbally" , "Disagree violently" , "Contest verbally, dispute" .)