The most common and most likely answer to this crossword clue is the 3 letter word IDS
I've seen this crossword clue in Independent
I
D
S
More clues leading to the result IDS
Buddy explains!

The straight part
We know that "Tory" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tory = ids.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.
What does IDS mean?
IDS noun- The unconscious impulsive component of the personality in the Freudian psychoanalytic model.
- Identifier.
- A freshwater fish of the family Cyprinidae, found across northern Europe and Asia, especially Leuciscus idus.