Expert contracted to provide cover had issue (10)
I believe the answer is:
reproduced
'had issue' is the definition.
(issue can mean someone's offspring)
'expert contracted to provide cover' is the wordplay.
'expert' becomes 'pro' (short for professional).
'contracted' becomes 'reduced' ('reduce' can be a synonym of 'contract').
'to provide cover' indicates putting letters inside (some letters cover up others).
'pro' inserted inside 'reduced' is 'REPRODUCED'.
(Other definitions for reproduced that I've seen before include "Copied" , "Had offspring" , "had issue" , "impressed again?" , "made again" .)