Get more involved in refitting of kitchen (7)
I believe the answer is:
thicken
'get more involved' is the definition.
(e.g. a plot)
'refitting of kitchen' is the wordplay.
'refitting of' indicates an anagram (I've seen 'refitting' mean this).
'kitchen' anagrammed gives 'THICKEN'.
'in' acts as a link.
(Other definitions for thicken that I've seen before include "Clot" , "Make more viscous" , "get fatter?" , "Become more involved" , "Make less flowing" .)