Always consort with English flier first (9)
I believe the answer is:
eternally
'always' is the definition.
(eternally means always)
'consort with english flier first' is the wordplay.
'consort with' becomes 'ally' (allying is a kind of consorting with).
'english' becomes 'e' (abbreviation).
'flier' becomes 'tern' (type of bird).
'first' says to put letters next to each other.
'e'+'tern'='etern'
'ally' after 'etern' is 'ETERNALLY'.
(Other definitions for eternally that I've seen before include "constantly" , "for good" , "Nearly let out forever" , "Always and forever" , "For evermore" .)