Wide excavation complete (5)
I believe the answer is:
whole
'complete' is the definition.
(similar in meaning)
'wide excavation' is the wordplay.
'wide' becomes 'w' (abbreviation e.g. in cricket).
'excavation' becomes 'hole' (I've seen this in another clue).
'w'+'hole'='WHOLE'
(Other definitions for whole that I've seen before include "Complete, containing all the parts" , "undamaged" , "In entirety" , "Entire, undivided" , "Integral" .)