Charlie has half an hour with the dog (3)
I believe the answer is:
cur
'the dog' is the definition.
(cur is a kind of dog)
'charlie has half an hour' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'has' means one lot of letters go next to another.
'half an hour' becomes 'ur'.
'c'+'ur'='CUR'
'with' is the link.
(Other definitions for cur that I've seen before include "Wretch" , "Aggressive mongrel" , "Despicable person" , "Non-pedigree dog" , "Poor dog" .)