Report on-fielder? (5)
I believe the answer is:
cover
This clue is a double definition.
'report on' is the first definition.
(synonyms)
'fielder?' is the second definition.
(I've seen this before)
(Other definitions for cover that I've seen before include "(Put) lid (on) - fielding position - insurance" , "Disguise" , "Extend over (an area)" , "the point of cricket" , "Lid or shelter" .)