Group of animals caught, reportedly (4)
I believe the answer is:
herd
'group of animals' is the definition.
(I've seen this before)
'caught reportedly' is the wordplay.
'caught' becomes 'heard' (I've seen this before).
'reportedly' indicates a 'sounds like' (homophone) clue.
'heard' sounds like 'HERD'.
(Other definitions for herd that I've seen before include "Group of, eg, cows" , "Flock" , "13 Down group" , "Assemblage" , "cattle together" .)