Rows with ferocious beasts, not good (5)
I believe the answer is:
tiers
'rows' is the definition.
(tier is a kind of row)
'ferocious beasts not good' is the wordplay.
'ferocious beasts' becomes 'tigers'.
'not' suggests deleting specific letters.
'good' becomes 'g' (abbreviation).
'tigers' with 'g' taken out is 'TIERS'.
'with' acts as a link.
(Other definitions for tiers that I've seen before include "Layers of rites" , "Rows; ranks" , "Row upon row" , "Layers, strata" , "aprons for kids" .)