Estimate based on ~83kg, ~170cm, 40, sedentary desk job + this training plan. High protein preserves muscle during the deficit. Recheck after 2 weeks of real weigh-ins and adjust ±100–150 kcal if loss is faster/slower than target.
No restrictions noted for you, so no foods are off-limits — the target is total calories and protein, not specific "clean" vs "unclean" foods. Prioritize protein + vegetables at each meal to stay full on fewer calories.