Spanners, tin & titanium left always with Jeff? (10,7)

'spanners' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'tin titanium left always with jeff?' is the wordplay.
I cannot really understand how this works, but
an anagram of 'tin' is 'nti' which is within the answer.
'left' could be 'l' (common abbreviation) and 'l' is present in the answer.
'always' could be 'ever' (synonyms) and 'ever' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?