Fastening a shingle that's out of position (8)
I believe the answer is:
leashing
'fastening' is the definition.
The answer and definition can be both to do with contact as well as being present participle verbs.
Maybe you can see an association between them that I can't see?
'a shingle that's out of position' is the wordplay.
'that's out of position' indicates anagramming the letters.
'a'+'shingle'='ashingle'
'ashingle' with letters rearranged gives 'LEASHING'.
Can you help me to learn more?
(Another definition for leashing that I've seen is " Tying up".)