Welcome current demand (7)
I believe the answer is:
acclaim
'welcome' is the definition.
(welcome can mean to acclaim or praise)
'current demand' is the wordplay.
'current' becomes 'ac' (alternating current).
'demand' becomes 'claim' (claim is a kind of demand).
'ac'+'claim'='ACCLAIM'
(Other definitions for acclaim that I've seen before include "Great public praise" , "Declare" , "Enthusiastic approval" , "Welcome with shouts of approval" , "Welcome enthusiastically" .)