Fooled one wearing big bra? (3)
I believe the answer is:
did
'fooled' is the definition.
The answer and definition can be both to do with social activities as well as being past participle verbs.
Maybe they are linked in a way I don't understand?
'one wearing big bra?' is the wordplay.
'one' becomes 'i' (Roman numeral).
'wearing' means one lot of letters goes inside another.
'big bra?' becomes 'dd' (I can't justify this - if you can you should give a lot more credence to this answer).
'i' inserted within 'dd' is 'DID'.
Can you help me to learn more?
(Other definitions for did that I've seen before include "Performed an action" , "Accomplished" , "Executed!" , "was satisfactory" , "Swindled" .)