Legion retreats to hold remote rural station (5,4)
I believe the answer is:
dairy farm
'rural station' is the definition.
(type of rural site)
'legion retreats to hold remote' is the wordplay.
'legion' becomes 'myriad'.
'retreats' says the letters should be written in reverse (I've seen 'retreat' mean this).
'to hold' is an insertion indicator.
'remote' becomes 'far' ('far' can be a synonym of 'remote').
'myriad' written backwards gives 'dairym'.
'dairym' going around 'far' is 'DAIRY FARM'.
(Other definitions for dairy farm that I've seen before include "cheese-shop supplier" , "Supplier of milk products" , "Cattle are kept for milk here" , "Milk-producing concern" , "rural building" .)