The phrase 'an intellectual man' is correct and usable in written English.
You can use it anytime you want to describe a person who possesses intellectual traits such as knowledge, wisdom, or the ability to think abstractly. For example, "My professor is an intellectual man who always challenges us to think outside the box."
He was an intellectual man".
"It would have been a crime to confine such an intellectual man to two or three minutes," explained Mr Mahama.
The composer has the look and manner more of an intellectual man than of an enthusiastic musician, and the intellectualisation of his musical ideas constitutes the difficulty of his music to the normal ear.
"Would those ideas have been prevalent in the 17th century?" The novelist spoke about her narrator as a man rationally preoccupied with the ordering of events: as an intellectual man of his age, he finds causation through sequence.
Although her letter doesn't address whether she also desired a career outside of the home, it clearly asserts that an intellectual woman will have a difficult time finding an equally intellectual man after college graduation.
He also produced a series of sexually explicit photos of himself posing with an elderly intellectual man who had been persecuted by the Communist Party.
As he matured, he developed into a genuinely intellectual man: inquisitive, studious, a man who loved learning.
The reason "Silence of the Lambs" is so scary, my grade-school self would explain confidently, is because the thought of a seemingly intellectual man moonlighting as a merciless cannibal seems HORRIFYINGLY plausible.
"He was a highly intellectual man who could talk for days on a wide range of subjects – but football was what he really loved.
To me, it was memorable because the image I had of a remote, intellectual man was quickly dispelled in his brief talk.
