The most common and most likely answer to this crossword clue is the 9 letter word ADVANCING
I've seen this crossword clue in The Daily Telegraph
A
D
V
A
N
C
I
N
G
Buddy explains!

The straight part
We know that "Lending/increasing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lending/increasing = advancing.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 ADVANCING mean?
ADVANCING verb- To promote or advantage.
- To move forward in space or time.
- To raise, be raised.
- The act of proceeding forward; an advance.