The most common and most likely answer to this crossword clue is the 10 letter word DEPUTATION
I've seen this crossword clue in The Daily Telegraph
D
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More clues leading to the result DEPUTATION
Buddy explains!
The straight part
We know that "Group attending talks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case group attending talks = deputation.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 DEPUTATION mean?
DEPUTATION noun- The act of deputing, or of appointing or commissioning a deputy or representative; office of a deputy or delegate; vicegerency.
- The person or persons deputed or commissioned by another person, party, or public body to act in his or its behalf; a delegation.
- Among Christian missionaries, the process or period of time during which they raise support in preparation for going to their mission field.