Clipping the hair because of performing ‘umrah in Dhū al-Qa’dah

Question:
A person performed ‛umrah in DhB al-Qa‛dah. Instead of shaving his
head, he felt he should merely trim it so that when he performs hajj,
he will shave his head. What is better for him, to trim or shave?

Answer:

I have not come across any juridical text which explicitly states that it
is better to trim the hair. However, the jurists and Had3th experts mention trimming of the hair for the person who is performing
tamattu‛ hajj. The reason they give is that he will be tying the ihram
for hajj within a few days and shaving his head after that. The one
performing tamattu‛ should therefore trim his hair [and not shave it].
We learn from this that the person under discussion [in the question]
should also trim his hair so that he will have some hair when he
performs hajj and he will be able to shave it.

Allah ta‛ala knows best.