Always spoken with an air (3)
'always' is the definition.
(synonyms)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for eer that I've seen before include "Always (poetic)" , "Ever poetically" , "Ever to the poet (3)." , "Before, poetically speaking (1'2)" , "Always (poetical)" .)
'an air' is the definition.
(thesaurus)
'always spoken with' is the wordplay.
'with' says the answer is hidden in the clue.
'WAY' is hidden within 'always spoken'.
(Other definitions for way that I've seen before include "Path" , "Method; route" , "'Manner, mode (3)'" , "Manner; road" , "Street" .)