Autocrat has to abandon singular repository (5)
I believe the answer is:
depot
'singular repository' is the definition.
'depot' can be an answer for 'repository' (depot is a kind of repository). I'm not sure about the 'singular' bit.
'autocrat has to abandon' is the wordplay.
'autocrat has' becomes 'dep' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'abandon' is an anagram indicator (I've seen 'abandoned' mean this (the original order is abandoned)).
'to' is an anagram of 'ot'.
'dep'+'ot'='DEPOT'
Can you help me to learn more?
(Other definitions for depot that I've seen before include "Storage base" , "Storehouse, repository" , "Place for storing or despatching goods" , "Place where buses and trains are kept" , "Storehouse as for supplies" .)