How "decimal" is frequently defined in a dictionary (5)
I believe the answer is:
often
'how' is the definition.
Both the answer and definition are adverbs. Perhaps there's a link between them I don't understand?
'decimal is frequently defined in a dictionary' is the wordplay.
I cannot really see how this works, but
'frequently' could be 'oft' (oft can mean frequently, eg oft-quoted) and 'oft' is found in the answer.
The remaining letters 'en' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for often that I've seen before include "In many instances" , "Frequently, at short intervals" , "on numerous occasions" , "Perhaps daily" , "A lot" .)