Extra keys for dad, maybe (5)
I believe the answer is:
added
'extra' is the definition.
('added' can be similar in meaning to 'extra')
'keys for dad maybe' is the wordplay.
'keys' becomes 'ed' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'maybe' indicates an anagram.
'dad' anagrammed gives 'add'.
'ed' after 'add' is 'ADDED'.
Can you help me to learn more?
(Other definitions for added that I've seen before include "Said" , "Extra" , "Appended; totalled" , "Counted up" , "Summed up" .)