Cryptic crossword clue
Tops up studies involving left overs 7

The most common and most likely answer to this crossword clue is the 7 letter word RELOADS

I've seen this crossword clue in Independent
R
E
L
O
A
D
S

Buddy explains!

The straight part
We know that "Tops up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tops up = reloads.
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 RELOADS mean?

RELOADS noun
  1. The process by which something is reloaded.
RELOADS verb
  1. To load (something) again
  2. To refresh a copy of a program etc. in memory or of a web page etc. on screen
  3. To load a gun again; or recharge a used cartridge.

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