Make flier? Don't bother! (6,2)
I believe the answer is:
forget it
'don't bother' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'make flier?' is the wordplay.
'make' becomes 'forge' (forging is a kind of making).
'flier?' becomes 'tit' (type of bird).
'forge'+'tit'='FORGET IT'
Can you help me to learn more?
(Other definitions for forget it that I've seen before include "ignore something" , "Not a chance" , "Let it go!" , "There's no need for apologies" , "Think no more of the matter" .)