Regrouping and carefully planning the next move, ah yes.

To see this at work in a game you need a few factors: Firstly, the current plan of attack has to be going poorly. So much so that the PCs can't continue to success without sustaining unacceptable losses of some sort. The sensible option at this point is to retreat.

Secondly, you need PCs who recognise this fact and will actually retreat, rather than pushing on regardless.

GMs can supply the first condition. Simply make the first attempt by the PCs at storming the villain's base go badly. For the second condition, you may need to drop ever larger hints. Don't simply kill the party outright if they push too far. Ramp up the danger until it becomes obvious that it's too dangerous to continue. Have a big ramp ready.

Transcript

Obi-Wan: Well the Orb wasn't at the fountain. We need to regroup and plan our next move.
GM: Obi-Wan, you sense the approach of an ominous Force presence.
Obi-Wan: Yeeess. I was afraid of this.
Obi-Wan: Let's try the other passage.
R2-D2: What are you afraid of? Confronting reality?
Obi-Wan: We don't have time for this now.
Obi-Wan: They're alert to our presence. We have to get out before they lock down the hangar.
Obi-Wan: Assuming they haven't already.
C-3PO: We can still make it if we go now.
Obi-Wan: Right. See you there in a few minutes.
Han: {running from troopers} We're on our way!
[SFX]: Pow!
Han: Bringing heaps of blasters!