Measurer of distance given more time for adjustment, nailing length (9)
I believe the answer is:
milometer
'measurer of distance' is the definition.
The definition suggests a singular noun which matches the answer.
'more time for adjustment nailing length' is the wordplay.
I cannot quite see how this works, but
'more' could be 'm' and 'm' is found within the answer.
'time' could be 'meter' (synonyms) and 'meter' is present in the answer.
'length' could be 'l' and 'l' is found within the answer.
The remaining letters 'io' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'given' is the link.
Can you help me to learn more?
(Other definitions for milometer that I've seen before include "Car distance indicator" , "Device recording distance travelled" .)