What does the cryptic crossword clue "Gunner I'd shot is suffering (8)" mean?

The definition is "suffering". The wordplay uses an anagram. anagram of GUNNER + I'D = ENDURING; definition: "suffering" The answer is ENDURING.

Gunner I'd shot is suffering (8)

Independent Cryptic #11799 | 33 Across | 2024-08-03 flower