Felt small craft cut speed (9)
I believe the answer is:
suspected
'felt' is the definition.
(I've seen this before)
'small craft cut speed' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'craft' is an anagram indicator (letters must be crafted into a new form).
'cut'+'speed'='cutspeed'
'cutspeed' is an anagram of 'uspected'.
's'+'uspected'='SUSPECTED'
(Other definitions for suspected that I've seen before include "Doubted the truth of (something)" , "Believed (someone) guilty" , "Imagined to be true" , "Fancied" , "thought likely" .)