The most common and most likely answer to this crossword clue is the 7 letter word LOLLIES
I've seen this crossword clue in The Guardian
L
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More clues leading to the result LOLLIES
Buddy explains!

The straight part
We know that "Suckers" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case suckers = lollies.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 LOLLIES mean?
LOLLIES noun- A piece of hard candy on a stick; a lollipop.
- Money.
- Any confection made from sugar, or high in sugar content; a sweet, a piece of candy.
- A lump.
- (Rhode Island) A type of undergarment worn by cheerleaders under their skirts in place of panties.