Meagre, yet inwardly dull (4)
I believe the answer is:
grey
'dull' is the definition.
(I've seen this before)
'meagre yet inwardly' is the wordplay.
'GREY' is hidden within the letters.
However, I'm unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for grey that I've seen before include "11 - if of 10, white" , "Unclear (area); dull (weather)" , "(Of weather) dull, cloudy" , "Gloomy colour" , "Nondescript; overcast (sky)" .)