Attractive opportunity opening finally after merchandise running short (4-7)
I believe the answer is:
good-looking
'attractive' is the definition.
(I've seen this before)
'opportunity opening finally after merchandise running short' is the wordplay.
'opportunity' becomes 'lookin' (I am not sure about this - if you are sure you should believe this answer much more).
'finally' suggests the final letters.
'after' means one lot of letters go next to another.
'merchandise' becomes 'goods' (goods can mean merchandise or wares).
'running short' means to remove the last letter.
The final letter of 'opening' is 'g'.
'goods' with its last letter taken away is 'good'.
'lookin'+'g'='looking'
'looking' put after 'good' is 'GOOD-LOOKING'.
Can you help me to learn more?
(Other definitions for good-looking that I've seen before include "(Of a person) attractive" , "Handsome - pretty" .)