Reduce Bf saving lean mass naturally

[Slacker78]

Hello folks, as recommended by Numbere user, i post here to ask a good suggestions to reduce my BF keeping as much as possible my muscle tissue. I cannot cycle now, because it should be hard and little safe to control estrogens with this % of Bf. So, i would try naturally to reach the goal.

These are my stats:

Heigh: 175 cm
Weight: 87 kg
Bf: 23% ( is not precise but it's around it )
Age: 38
Training experience: 10 years.

Do you have some good tips i could follow to reach the goal... naturally ?

At the bottom, my current pictures... forgive me for depilation, but i'm just waiting for a good wheather before ! ( I know, it's not a good show... but that's it ! )