It has a repetitive cry (6)
I believe the answer is:
parrot
'repetitive cry' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'it has a' is the wordplay.
I cannot quite see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
'a' is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for parrot that I've seen before include "Repeat without understanding" , "Sick as a -" , "Imitative bird" , "Repeater" , "Bird (that repeats)" .)