Rally (7)
'rally' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for regroup that I've seen before include "Get back into position" , "form new parties" , "Come together again" , "Gather (after an attack)" , "Consider new tactics after a setback" .)
'rally' is the definition.
(pep rally is a kind of rally)
This is all the clue.
(Other definitions for pep that I've seen before include "Energy or enthusiasm" , "Palindrome for vigour" , "Energy, zip" , "Palindromic vim and vigour" , "Palindromic energy or vim" .)