The most common and most likely answer to this crossword clue is the 7 letter word EUNUCHS
E
U
N
U
C
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S
More clues leading to the result EUNUCHS
- Sultan’s guards regularly return such bananas
- They mind the sultanas not being whole
- They have no balls for regular returns — such madness!
- Initially Equity underserved northerners, casting such men without parts
- Seraglio guards awkwardly use punch lacking power
- Beduin lunch host regularly entertains 25 men
- Girl upset about Greek character and chaplain, ineffectual men
- Men of limited abilities backing quiet suggestion in French article? On the contrary
- No-balls delivered by England against international team leads to such confusion
- Ineffectual people on ecstasy and speed losing head with such frenzy
Buddy explains!

The straight part
We know that "They have no balls" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they have no balls = eunuchs.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 EUNUCHS mean?
EUNUCHS noun- A castrated human male.
- Such a man employed as harem guard or in certain (mainly Eastern) monarchies (e.g. late Roman and Chinese Empires) as court or state officials.
- (in translations of ancient texts) A man who is not inclined to marry and procreate.