The most common and most likely answer to this crossword clue is the 7 letter word OFTENER
I've seen this crossword clue in The Guardian
O
F
T
E
N
E
R
More clues leading to the result OFTENER
- Water additive gives off sulphur more regularly
- Something that eases section off with increased regularity
- It’s not free to broadcast with higher frequency
- Exeter’s starter for ten bungled more and more
- Laundering aid, without a hint of soap more frequently
- About a currency note losing a bit of newness more frequently
Buddy explains!

The straight part
We know that "more and more" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more and more = oftener.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 OFTENER mean?
OFTENER adverb- Frequently, many times.