The most common and most likely answer to this crossword clue is the 8 plus 7 letter word AVERSION THERAPY
I've seen this crossword clue in Independent
A
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More clues leading to the result AVERSION THERAPY
- People generally bearing blame after a model addict's treatment
- Account’s what fall guy accepts in case of accessory getting special treatment
- A kind, sad heart with quiet yen to give treatment for bad behaviour
- Jerusalem gets the blame in a really shocking treatment
- A veterinary shop could provide a form of treatment
- Develop hysteria — a proven cure for addiction
- Shocking treatment of heavy prisoner at Strangeways?
Buddy explains!
The straight part
We know that "special treatment" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case special treatment = aversion therapy.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.