The importance found in team dug-out? (9)
I believe the answer is:
magnitude
'the importance' is the definition.
(magnitude is a kind of importance)
'in team dug-out?' is the wordplay.
'out?' is an anagram indicator (out can mean wrong or inaccurate).
'in'+'team'+'dug'='inteamdug'
'inteamdug' anagrammed gives 'MAGNITUDE'.
'found' is the link.
(Other definitions for magnitude that I've seen before include "Eating mud (anag.)" , "(A star's) brightness" , "Dimensions" , "Largeness or size" , "Relative importance" .)