The most common and most likely answer to this crossword clue is the 8 letter word ADOPTING
I've seen this crossword clue in The Times
A
D
O
P
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More clues leading to the result ADOPTING
Buddy explains!
The straight part
We know that "Taking on" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case taking on = adopting.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 ADOPTING mean?
ADOPTING verb- To take by choice into relationship (a child, heir, friend, citizen, etc.)
- To take or receive as one's own what is not so naturally.
- To select and take or approve.
- To win ten consecutive games against an opponent