Of eight in a boat? (3)
I believe the answer is:
row
'a boat?' is the definition.
(thesaurus)
'of eight in' is the wordplay.
'of' becomes 'o''.
'eight' becomes 'rw' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'o' inserted into 'rw' is 'ROW'.
Can you help me to learn more?
(Other definitions for row that I've seen before include "Quarrel; use oars" , "Barney - rank" , "Propel boat manually" , "Fight in a queue?" , "Line, tier" .)