The most common and most likely answer to this crossword clue is the 5 letter word REAMS
I've seen this crossword clue in The Daily Telegraph
R
E
A
M
S
More clues leading to the result REAMS
- Loads last of these aboard warships
- A lot of fantasies not getting started
- Much ahead of noon kept in reserve
- Loads of paper
- Fishes don’t start papers
- Concerning the morning’s papers
- Scrapes the barrel, recruiting bottom of the pile into forces
- Lots of pieces of paper are put in order — handwritten stuff
- A lot of sheep across Spain
- Many sheets of paper are rewritten, as well as manuscript
Buddy explains!

The straight part
We know that "A lot" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a lot = reams.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 REAMS mean?
REAMS verb- To cream; mantle; foam; froth.
- To enlarge a hole, especially using a reamer; to bore a hole wider.
- To shape or form, especially using a reamer.
- To remove (material) by reaming.
- To remove burrs and debris from a freshly bored hole.
- To yell at or berate.
- (by extension from sense of enlarging a hole) To sexually penetrate in a rough and painful way.
- A bundle, package, or quantity of paper, nowadays usually containing 500 sheets.
- (chiefly in the plural) An abstract large amount of something.