Hornblower's first crew measure up? (6)
I believe the answer is:
height
'measure up?' is the definition.
'height' can be an answer for 'measure' (thesaurus). I'm unsure of the 'up?' bit.
'hornblower's first crew' is the wordplay.
'hornblower's first' becomes 'h' (1st letter of 'hornblower').
'crew' becomes 'eight' (an eight-person rowing team).
'h'+'eight'='HEIGHT'
Can you help me to learn more?
(Other definitions for height that I've seen before include "Stature" , "Measurement from top to bottom" , "Rising ground; extreme example" , "Vertical extent" , "Hill, elevation" .)