Yen may finish measures in restlessness (5,4)
I believe the answer is:
itchy feet
'restlessness' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'yen may finish measures' is the wordplay.
'yen' becomes 'itch' (I've seen this in another clue).
'finish' suggests the final letters.
'measures' becomes 'feet' (foot is a kind of measure).
The last letter of 'may' is 'y'.
'itch'+'y'+'feet'='ITCHY FEET'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for itchy feet that I've seen before include "Strong desire to travel" , "reason for leaving?" , "They show a strong urge to travel" , "Those with these have a strong impulse to travel" , "Have . . . . . . . . . with restless desire to travel" .)