Current doctor, awfully fit (5)
I believe the answer is:
drift
'current' is the definition.
(can be similar in meaning in navigation contexts)
'doctor awfully fit' is the wordplay.
'doctor' becomes 'dr' (synonyms).
'awfully' is an anagram indicator.
'fit' anagrammed gives 'ift'.
'dr'+'ift'='DRIFT'
(Other definitions for drift that I've seen before include "Float along as on waves" , "Large heap (of snow)" , "General idea (of snow?)" , "move around without end" , "Trend; meaning" .)