El Chapo getting busted is historically significant (7)
I believe the answer is:
epochal
'historically significant' is the definition.
'epochal' can be an answer for 'significant' ('epochal' can be similar in meaning to 'significant'). I'm not certain of the 'historically' bit.
'el chapo getting busted' is the wordplay.
'getting' is a charade indicator (letters next to each other).
'busted' indicates anagramming the letters.
'el'+'chapo'='elchapo'
'elchapo' is an anagram of 'EPOCHAL'.
'is' is the link.
Can you help me to learn more?
(Other definitions for epochal that I've seen before include "typical of the age" , "Historic" , "of a certain age" , "beginning a new era" , "of a particular age" .)