The most common and most likely answer to this crossword clue is the 4 letter word QUIZ
I've seen this crossword clue in Financial Times
Q
U
I
Z
More clues leading to the result QUIZ
- Unknown Parisian who comes first in game show?
- Question 1: what’s the capital of 28? That sort of thing?
- Pointless, maybe, when heartily fazed after Question 1
- Grill midsection of squid, an unspecified amount
- 22 reckoned to be here in Scrabble competition
- Question one — capital of Zambia could be part of this
- Stop wasting time with a variable pump
- Cue to use butt of machine-gun in centre for interrogation
- There’ll be questions asked if this programme is broadcast
- Question Liz not starting grill
Buddy explains!

The straight part
We know that "That sort of thing?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that sort of thing? = quiz.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 QUIZ mean?
QUIZ noun- An odd, puzzling or absurd person or thing.
- A competition in the answering of questions.
- A school examination of less importance, or of greater brevity, than others given in the same course.
- To hoax; to chaff or mock with pretended seriousness of discourse; to make sport of, as by obscure questions.
- To peer at; to eye suspiciously or mockingly.
- To question closely, to interrogate.
- To instruct by means of a quiz.
- To play with a quiz.