Range currently stocked? At a subsequent time, rather (5)
I believe the answer is:
again
'rather' is the definition.
(thesaurus)
'range currently stocked?' is the wordplay.
'range' becomes 'aga' (I've seen this before**).
'currently stocked?' becomes 'in' (as in a shop having something 'in').
'aga'+'in'='AGAIN'
'at a subsequent time' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
(Other definitions for again that I've seen before include "return" , "Predictably perhaps" , "On the other hand" , "One more time, encore" , "Furthermore" .)