The most common and most likely answer to this crossword clue is the 7 letter word UPTICKS
I've seen this crossword clue in The Daily Telegraph
U
P
T
I
C
K
S
Buddy explains!
The straight part
We know that "increases" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case increases = upticks.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 UPTICKS mean?
UPTICKS noun- A small increase or upward change in something that has been steady or declining.
- A stock market transaction or quote at a price above a preceding one.