A man entered Morrisons in Station Road at around 5.10pm on Monday 15 January carrying an orange bag for life.
He put five bottles of whisky, valued at £122, into a shopping basket.
The man walked to the front of the store and put them into the bag, before leaving without paying.
A threat was then made to a male member of staff who challenged the man.
The suspect is described as:
•Short dark hair and unshaven.
•Approximately 5ft 11ins
•Wearing black trainers, black jeans, a grey shirt and a blue jumper
If you have any information relating to this case, please call 101 quoting reference '44180019033', or contact Crimestoppers anonymously.