have a keen interest in

have a keen interest in (something)

To be very interested in or fascinated by something. John really has a keen interest in photography lately. I didn't realize that Amie had such a keen interest in painting until I saw some of her work—she's really talented!
See also: have, interest, keen
Farlex Dictionary of Idioms.

have a keen interest in something

to have a strong interest in something; to be very interested in something. Tom had always had a keen interest in music, so he started a band. The children have a keen interest in having apet, so I bought them a cat.
See also: have, interest, keen
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • have a keen interest in (something)
  • interest
  • be mad keen
  • be mad keen (on someone or something)
  • have a thing for (something)
  • keen about, be
  • be keen about (someone or something)
  • take an interest
  • take an interest in
  • take an interest in (someone or something)