The most common and most likely answer to this crossword clue is the 9 letter word MASCULINE
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The straight part
We know that "Macho" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case macho = masculine.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 MASCULINE mean?
MASCULINE noun- (grammar) The masculine gender.
- (grammar) A word of the masculine gender.
- That which is masculine.
- (possibly obsolete) A man.
- Of or pertaining to the male gender; manly.
- Of or pertaining to the male sex; biologically male, not female.
- Belonging to males; typically used by males.
- Having the qualities stereotypically associated with men: virile, aggressive, not effeminate.
- (grammar) Of, pertaining or belonging to the male grammatical gender, in languages that have gender distinctions.