For context: I'm 5'11"/M/55/205. Last February I started working on diet and some cardio fitness for about 3 months prior to beginning strong lifts (later switching to Starting Strength). I had never lifted before other than an occasional month or so with no real program - or results for that matter. I started at 240 pounds, got down to about 195, and in September began to primarily eat at maintenance while lifting. I do not consider my initial weight loss to be a "cut" in the way that the term is used here. In that time I've gained back about 10 pounds, but have not gained any noticeable fat - i.e. I still have the same waist measurements as I did at 195. Some areas have grown a fair amount (thighs, chest, traps, back, behind), while others are close to the same (arms).
I would estimate my body fat percentage, based on comparable pics, to be about 19-21%. I would like to drop to about 15-16%. I don't have a desire to be body-builder lean at my age, but wouldn't mind more definition. There's a little bit of definition coming now.
My question regarding cutting:
For those that do this regularly, how long would a cut be expected to last?
And, what kind of deficit would be reasonable to use. I do not want to stay in a deficit long and I am not trying to make strength gains while cutting (at least that's not my goal).
I exhausted my NLP and currently do an intermediate 531 type of program that has a mix of strength main lifts and hypertrophy based assistance.