Pair in unkempt woodland (3)
I believe the answer is:
two
'pair' is the definition.
(a pair means two of something)
'in unkempt woodland' is the wordplay.
'in' indicates the answer is hidden within the clue.
'TWO' is hidden within 'unkempt woodland'.
(Other definitions for two that I've seen before include "Minimal number of partners" , "limited company?" , "not very many" , "Company, so it's said" , "A low number" .)