Timid to admit, initially, not very easy to communicate (6)
I believe the answer is:
convey
'communicate' is the definition.
('convey' can be a synonym of 'communicate')
'timid to admit initially not very easy' is the wordplay.
'timid' becomes 'coy' ('coy' can be similar in meaning to 'timid').
'to admit' indicates putting letters inside.
'initially' suggests taking the first letters.
The first letters of 'not very easy' is 'nve'.
'coy' placed around 'nve' is 'CONVEY'.
'to' is the link.
(Other definitions for convey that I've seen before include "Transport; communicate" , "Pass on or transport" , "'Pass on, transfer (6)'" , "Carry from one place to another" , "Make known -- pass on" .)