Skirt round old temple displaying measure of power (8)
I believe the answer is:
kilowatt
'measure of power' is the definition.
(I've seen this before)
'skirt round old temple' is the wordplay.
'skirt' becomes 'kilt' (kilt is a kind of skirt**).
'round' means one lot of letters goes inside another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'temple' becomes 'wat' (type of Asian temple eg Angkor Wat).
'o'+'wat'='owat'
'kilt' going around 'owat' is 'KILOWATT'.
'displaying' is the link.
(Other definitions for kilowatt that I've seen before include "One thousand joules per second" , "kW" , "Unit of electrical power" , "Power used by one bar of the average electric fire" , "Unit of electric power" .)