Doing a turn in a boat, possibly (5)
I believe the answer is:
about
'doing a' is the definition.
I can't tell whether this defines the answer.
'turn in a boat possibly' is the wordplay.
'turn' becomes 'u' (a 'U-turn' is a kind of turn).
'in' is an insertion indicator.
'possibly' is an anagram indicator.
'boat' with letters rearranged gives 'abot'.
'u' put within 'abot' is 'ABOUT'.
Can you help me to learn more?
(Other definitions for about that I've seen before include "Concerning (something)" , "Engaged in" , "in the offing?" , "On the topic of" , "Moving" .)