An odd number of feet in the enclosure (4)
I believe the answer is:
yard
This clue might be a double definition.
'an odd number of feet' is the first definition.
'yard' can be an answer for 'feet' (I have seen 'several feet' mean 'yard' so perhaps 'feet' could also mean 'yard'). I'm not certain of the 'an odd number of' bit.
'enclosure' is the second definition.
(I know that yard is a type of enclosure)
'in the' acts as a link.
Can you help me to learn more?
(Other definitions for yard that I've seen before include "several feet" , "Dray (anag.)" , "area behind the house" , "Get the measure" , "Measure - enclosed space" .)