Large body will need tons crammed into short dress (4)
I believe the answer is:
'large body' is the definition.
'star' can be an answer for 'body' (I have seen 'Celestial body' mean 'star' so perhaps 'body' could also mean 'star'). I'm not sure about the 'large' bit.
'tons crammed into short dress' is the wordplay.
I cannot quite see how this works, but
'tons' could be 't' and 't' is found within the answer.
The remaining letters 'sar' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'will need' is the link.
Can you help me to learn more?
(Other definitions for star that I've seen before include "Lead actor" , "virtuoso" , "Outstanding entertainer" , "Celebrity - heavenly body" , "Heavenly apparition" .)