On a regular basis, a diver may be heard (5)

I believe the answer is:
daily
'heard' is the definition.
Both the answer and definition are adjectives. Maybe you can see an association between them that I can't see?
'on a regular basis a diver may' is the wordplay.
'on' indicates putting letters inside (as in clothing 'on' a person).
'a regular' means one should take alternating letters.
'a diver may' becomes 'dly' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The alternate letters of 'basis' are 'ai'.
'ai' inserted into 'dly' is 'DAILY'.
'be' is the link.
Can you help me to learn more?
(Other definitions for daily that I've seen before include "A rag, perhaps" , "often" , "Newspaper; cleaner" , "Cleaner; every 24 hours" , "Quotidian" .)
