What does the cryptic crossword clue "Swell up? Leg near exploded! (7)" mean?

The definition is "Swell". The wordplay uses an anagram. anagram of LEG + NEAR = ENLARGE; definition: "Swell" The answer is ENLARGE.

Swell up? Leg near exploded! (7)

Times Cryptic #27828 | 5 Down | 2020-11-21 flower