Make reference to having quantity of current flowing through holiday spot (8)
I believe the answer is:
campsite
'holiday spot' is the definition.
'make reference to having quantity of current flowing' is the wordplay.
'make reference to' becomes 'cite' (I've seen this before).
'having' indicates putting letters inside.
'quantity of current flowing' becomes 'amps' (amp or ampere is a unit of electrical current).
'cite' enclosing 'amps' is 'CAMPSITE'.
'through' is the link.
(Other definitions for campsite that I've seen before include "for temporary accommodation" , "Ground for tents" , "Location for pitching tents" .)