Old bag from Turkey available for purchase (5)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

TR (abbreviation for the country of Turkey, or the Republic of Türkiye as the locals prefer to call it) + OUT (available for purchase, as in “the latest volume of the series is out now”). Trout = old bag = rather offensive terms for an annoying or unattractive person.