It's a touching thing to do (7)
I believe the answer is:
contact
'it's a touching' is the definition.
(contact is a kind of touching)
'thing to do' is the wordplay.
'thing' becomes 'cont' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to do' becomes 'act' (I've seen this in another clue).
'cont'+'act'='CONTACT'
Can you help me to learn more?
(Other definitions for contact that I've seen before include "Maybe page" , "Talk to" , "Communication" , "Get hold of" , "Useful acquaintance" .)