Look like rowdy males lacking a beer (8)
I believe the answer is:
resemble
'look like' is the definition.
(I've seen this before)
'rowdy males lacking a beer' is the wordplay.
'rowdy' indicates an anagram.
'lacking' is a deletion indicator.
'males' with 'a' removed is 'mles'.
'mles'+'beer'='mlesbeer'
'mlesbeer' with letters rearranged gives 'RESEMBLE'.
(Other definitions for resemble that I've seen before include "Look or be like another" , "favour" , "Echo" , "Be like another in appearance" , "Look similar to" .)