One male celeb I suspect being idiot (8)
I believe the answer is:
imbecile
'idiot' is the definition.
(synonyms)
'one male celeb i suspect' is the wordplay.
'one' becomes 'I' (Roman numeral).
'male' becomes 'm' (common abbreviation).
'suspect' is an anagram indicator (a suspicious or unusual spelling).
'celeb'+'i'='celebi'
'celebi' with letters rearranged gives 'becile'.
'i'+'m'+'becile'='IMBECILE'
'being' is the link.
(Other definitions for imbecile that I've seen before include "Abusive word for foolish person" , "Moron or cretin" , "Silly person or idiot" , "Jerk" , "Sap" .)