Tired and tense, relying on pull to get somewhere (5)
I believe the answer is:
drawn
'tired' is the definition.
(similar in meaning)
'and tense relying on pull to get somewhere' is the wordplay.
I cannot really understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'pull' could be 'draw' (synonyms) and 'draw' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for drawn that I've seen before include "Tense-looking; tied" , "Depicted - haggard" , "Picked" , "Depicted (as being lined?)" , "stressed" .)