The most common and most likely answer to this crossword clue is the 7 letter word GEEZERS
I've seen this crossword clue in The Times
G
E
E
Z
E
R
S
Buddy explains!

The straight part
We know that "Blokes" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case blokes = geezers.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 GEEZERS mean?
GEEZERS noun- (dated in US) A male person.
- (chiefly Cockney) Someone affable but morally dubious; a wide boy.
- Term of address for a male.
- (sometimes mildly) An old person, usually a male, typically a cranky old man.
- Wife; old woman.
- A boiling natural spring which throws forth at frequent intervals jets of water, mud etc., driven up by the expansive power of steam.
- An instantaneous, and often dangerous, hot water heater.
- A domestic water boiler.