The most common and most likely answer to this crossword clue is the 10 letter word WOMANISING
I've seen this crossword clue in Financial Times
W
O
M
A
N
I
S
I
N
G
Buddy explains!

The straight part
We know that "putting it about a bit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case putting it about a bit = womanising.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 WOMANISING mean?
WOMANISING verb- (said of a man) To flirt with and/or seduce, or attempt to seduce, women, especially lecherously.
- (usually figurative) To turn into a woman; to feminize.