The close relations, as usual, sent out (7)
I believe the answer is:
parents
'the close relations' is the definition.
'parents' can be an answer for 'relations' (parent is a kind of relation). I'm unsure of the 'the close' bit.
'usual sent out' is the wordplay.
'usual' becomes 'par'.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'sent' with letters rearranged gives 'ents'.
'par'+'ents'='PARENTS'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for parents that I've seen before include "Entraps (anag.)" , "Mother and father" , "Mum and dad" , "Mothers and fathers" .)