(がっきゅう)(はだ)

がっきゅうはだ
noun
scholarly temperament; academic bent; scholar type
personality
1. scholarly temperament; academic bent
Describes a person whose natural disposition is toward academic study and research. Such a person is typically focused, detail-oriented, and more interested in learning than in practical or commercial pursuits.
He has a scholarly temperament and is in the lab even on days off.
Because the teacher has an academic bent, the detailed explanations are helpful.
While having a scholarly disposition, he is a person who also handles practical affairs thoroughly.

学究(がっきゅう) means scholarly pursuit or academic study; (はだ) literally means skin but as a suffix means temperament or natural disposition.

THE 〜(はだ) SUFFIX:
Attaches to nouns to mean "having the temperament/character of ~":