Displeasure at being back in Siberia (3)
I believe the answer is:
ire
'displeasure' is the definition.
(thesaurus)
'being back in siberia' is the wordplay.
'being back' shows that the letters should be reversed in order.
'in' indicates a hidden word.
'eri' can be found hidden inside 'siberia'.
'eri' in reverse letter order is 'IRE'.
'at' is the link.
(Other definitions for ire that I've seen before include "Hot temper" , "heat" , "Anger, rage" , "Anger among admirers" , "passion" .)