Describe old aircraft in talk (7)
I believe the answer is:
explain
'describe' is the definition.
(I've seen this before)
'old aircraft in talk' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'aircraft in talk' becomes 'plain' (I can't explain this - if you can you should believe this answer much more).
'ex'+'plain'='EXPLAIN'
Can you help me to learn more?
(Other definitions for explain that I've seen before include "Describe" , "Justify" , "Give reason for" , "Expound" , "Shed light" .)