Give an interpretation of obsolete unit of weight? (7)
I believe the answer is:
expound
'give' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
'an interpretation of obsolete unit of weight?' is the wordplay.
'an interpretation of obsolete unit of' becomes 'ex' (I can't justify this - if you can you should give a lot more credence to this answer).
'weight?' becomes 'pound' (pound is a kind of weight).
'ex'+'pound'='EXPOUND'
Can you help me to learn more?
(Other definitions for expound that I've seen before include "Explain and interpret" , "Set out in a detailed and learned way" , "Set forth, explain in detail" , "Spell out" , "Upend ox (anag)" .)