Standard card (4)
I believe the answer is:
jack
I believe this clue is a double definition.
'standard' is the first definition.
(both can refer to a flag)
'card' is the second definition.
(type of playing card)
(Other definitions for jack that I've seen before include "Car lifter" , "Lifting device - flag - boy's name - card - fish" , "Card; man's name" , "White bowls target" , "elevator?" .)