Required a pale man ... (6)
I believe the answer is:
wanted
'required' is the definition.
('want' can be a synonym of 'require')
'a pale man' is the wordplay.
'a pale' becomes 'wan' (wan can mean pale or grey).
'man' becomes 'ted' (Ted is a man's name).
'wan'+'ted'='WANTED'
(Other definitions for wanted that I've seen before include "Desired or wished for" , "Desired, needed" , "sought by police?" , "Desired by police?" , "Wished-for" .)